Stem Casters
Threaded, non-threaded and adapter stem casters from trusted manufacturers are a quick and easy way to attach wheels to wire shelving, office furniture, carts, hand trucks, and anything with the right type of fastener opening. Stem adapter stem casters are great for wire shelving units where the caster must be attached into a hollow tube or pipe. The standard threaded stem sizes and non-threaded grip ring sizes are here, but for special cases or specific stem sizes please call us and we will find the stem caster that is right for you.
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2" Chariot Premium Chair Caster Poly Flexon Wheel, Chrome Finish (Grip Ring Stem) - FH20BPC4953
Durable Superior Casters2" Chariot Premium Chair Caster with Poly Flexon Wheel and Chrome Finish Full heat treated raceway swivel to enhace durability. Black non-marking Poly Flexon wheel. Grip ring stem, overall height of 2-3/4" and wheel comes with precision ball bearing 75 lbs. Capacity Gr..$6.46 -
3" Polyon Aluminum Wheel Swivel Grip Ring Stem Caster - 350 lbs. Capacity - 21PA30GL4391YY
Durable Superior Casters3" Polyon Aluminum Wheel Swivel Grip Ring Stem Caster 3" x 1-1/4" Polyon aluminum wheel, 7/16" x 1-3/8" swivel grip ring stem, and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight aluminum core. Aluminum core has a strong attractive ..$8.60 -
3" Polyon Aluminum Wheel Swivel Grip Ring Stem Caster W/ Brake - 350 lbs. Capacity - 21PA30GL4391TY
Durable Superior Casters3" Polyon Aluminum Wheel Swivel Grip Ring Stem Caster with Top Lock Brake 3" x 1-1/4" Polyon aluminum wheel, 350lbs. capacity, 7/16" x 1-3/8" swivel grip ring stem, with brake, and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight aluminum..$9.98 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster (1/2")- 350 lbs. Capacity - 21PA30GL4367YY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Stem Caster 3" x 1-1/4" Polyon aluminum wheel, 1/2" - NC13 x 1" (coarse) threaded swivel stem, and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight aluminum core. Aluminum core has a strong attractive appearan..$8.60 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster With Brake (1/2") - 350 lbs. Capacity - 21PA30GL4367TY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster with Top Lock Brake 3" x 1-1/4" Polyon aluminum wheel, 1/2" x 1" coarse threaded swivel stem, with brake and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight aluminum core. Aluminum cor..$9.98 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster (1/2") - 350 lbs. Capacity - 21PA30GL4368YY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster 3" x 1-1/4" Polyon Aluminum wheel, 1/2" x 1-1/2" coarse threaded swivel stem, and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight aluminum core. Aluminum core has a strong attract..$8.60 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster W/ Brake (1/2") - 350 lbs. Capacity - 21PA30GL4368TY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster with Top Lock Brake 3" x 1-1/4" Polyon Aluminum wheel, 1/2" x 1-1/2" coarse threaded swivel stem, with brake and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight aluminum core. Alu..$9.98 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster (3/8") - 350 lbs. Capacity - 21PA30GL4362YY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster 3" x 1-1/4" Polyon aluminum wheel, 3/8" x 1-1/2" coarse threaded swivel stem, and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight aluminum core. Aluminum core has a strong at..$8.60 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster W/ Brake (3/8") - 350 lbs. Capacity - 21PA30GL4362TY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster with Top Lock Brake 3" x 1-1/4" Polyon aluminum wheel, 350lbs capacity, 3/8" x 1-1/2" coarse threaded swivel stem, with brake and overall height of 4". Medium duty. Polyurethane elastomer tread chemically bonded to a light-weight alumin..$9.98 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster W/ Expandable Adapter - 350 lbs. capacity - 21PA30GL4374YY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster with Expandable Adapter 3" x 1-1/4" Polyon aluminum wheel on threaded swivel stem caster, 4" overall height, expandable adapter size options available. Medium duty. Polyurethane elastomer tread chemically bonded to a light-wei..$10.84 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster W/ Expandable Adapter And Brake - 350 lbs. capacity - 21PA30GL4374TY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster with Expandable Adapter and Top Lock Brake 3" x 1-1/4" Polyon aluminum wheel on threaded swivel stem caster, with brake, 4" overall height, expandable adapter size options available. Medium duty. Polyurethane elastomer tread c..$12.36 -
3" Polyon Aluminum Wheel Threaded Swivel Stem Caster W/ Expandable Adapter and Total Lock Brake - 350 lbs. capacity - T3PA30GL4374YY
Durable Superior Casters3" Polyon Aluminum Wheel Threaded Swivel Stem Caster with Expandable Adapter and Total Lock Brake 3" x 1-1/4" Polyon Aluminum wheel on threaded swivel stem caster, expandable adapter, total lock brake, 4-1/8" overall height. Medium duty. Total lock brake locks the wheel from turning ..$13.34 -
3" Thermo-Pro Wheel Swivel Grip Ring Stem Caster - 210 lbs. Capacity - 21TP30GI4491YY
Durable Superior Casters3" Thermo-Pro Wheel Swivel Grip Ring Stem Caster 3" x 1-1/4" Thermo-Pro wheel, 7/16" x 1-3/8" swivel grip ring stem, and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absorbing cushioned ride offers floor protection an..$5.34 -
3" Thermo-Pro Wheel Swivel Grip Ring Stem Caster 100 lbs. Capacity - 08TP30AT8090YY
Durable Superior Casters3" Thermo-Pro Wheel Swivel Grip Ring Stem Caster 3" x 13/16" Thermo-Pro wheel (non-marking thermoplastic rubber tread), 7/16" x 1-3/16" swivel grip ring stem, and overall height of 3-5/8". Light duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefi..$6.00 -
3" Thermo-Pro Wheel Swivel Grip Ring Stem Caster W/ Brake - 210 lbs. Capacity - 21TP30GI4491TY
Durable Superior Casters3" Thermo-Pro Wheel Swivel Grip Ring Stem Caster with Top Lock Brake 3" x 1-1/4" Thermo-Pro wheel, 7/16" x 1-3/8" swivel grip ring stem, with brake and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absorbing cushi..$6.72 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster (1/2") - 210 lbs. Capacity - 21TP30GI4467YY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster 3" x 1-1/4" Thermo-Pro wheel, 1/2" - NC13 x 1" (coarse) threaded swivel stem, and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absorbing cushioned ride of..$5.34 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster W/ Brake (1/2") - 210 lbs. Capacity - 21TP30GI4467TY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster with Top Lock Brake 3" x 1-1/4" Thermo-Pro wheel, 1/2" - NC13 x 1" threaded swivel stem, with brake and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absorbing ..$6.72 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster (1/2") - 210 lbs. Capacity - 21TP30GI4468YY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster 3" x 1-1/4" Thermo-Pro wheel, 1/2" - NC13 x 1-1/2" threaded swivel stem, and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absorbing cushioned ride offers floor..$5.34 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster W/ Brake (1/2") - 210 lbs. Capacity - 21TP30GI4468TY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster with Top 3" x 1-1/4" Thermo-Pro wheel, 1/2" - NC13 x 1-1/2" threaded swivel stem, with brake and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absorbing c..$6.72 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster (3/8") - 210 lbs. Capacity - 21TP30GI4462YY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster 3" x 1-1/4" Thermo-Pro wheel, 3/8" - NC13 x 1-1/2" threaded swivel stem, and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absorbing cushioned ride offers floor..$5.34 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster W/ Brake (3/8") - 210 lbs. Capacity - 21TP30GI4462TY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster with Top Lock Brake 3" x 1-1/4" Thermo-Pro wheel, 3/8" - NC13 x 1-1/2" threaded swivel stem, with brake and overall height of 4". Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock a..$6.72 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster W/ Expandable Adapter - 210 lbs. capacity - 21TP30GI4474YY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster with Expandable Adapter 3" 1-1/4" Thermo-Pro wheel on threaded swivel stem caster, 4" overall height, expandable adapter size options available. Medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin &nb..$7.72 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster W/ Expandable Adapter And Brake - 210 lbs. capacity - 21TP30GI4474TY
Durable Superior Casters3" Thermo-Pro Wheel Threaded Swivel Stem Caster with Expandable Adapter and Top Lock Brake 3" 1-1/4" Thermo-Pro wheel on threaded swivel stem caster, with brake, 4" overall height, expandable adapter size options available. Medium duty. Non-marking Thermoplastic rubber tread is perma..$9.12 -
3" Thermo-Pro Wheel Threaded Swivel Stem Caster W/ Expandable Adapter and Total Lock Brake - 210 lbs. capacity - T3TP30GI4474YY
Durable Superior Casters3" Thermo-Pro Wheel on Threaded Swivel Stem Caster with Expandalbe Adapter and Total Lock Brake 3" 1-1/4" Thermo-pro wheel on threaded swivel stem caster, expandable adapter, total lock brake, and 4-1/8" overall height. Medium duty. Total lock brake locks the wheel from turning and l..$10.64 -
3-1/2" Solid Polyurethane Wheel Threaded Swivel Stem Caster W/ Expandable Adapter - 260lb. capacity - C-LM35X2PUS
DH International3" x 1-1/4" Solid polyurethane wheel on threaded swivel stem caster, 350lbs. capacity, 4-11/16" overall height, expandable adapter size options available. Medium duty. • Solid Polyurethane Elastomer wheel. • Lightweight and resistant to rust and corrosion. • Tempera..$10.74 -
4" DuraLastomer Wheel Threaded Swivel Stem Caster w/ Total Lock Brake (1/2") - 350 lbs. Capacity - 17SU40GL9068YY
Durable Superior Casters4" DuraLastomer Wheel Theaded Swivel Stem Caster with Total Lock Brake 4" x 1-1/4" DuraLastomer wheel (solid non-marking polyurethane elastomer), 350lbs. capacity, 1/2" - NC13 x 1-1/2" threaded swivel stem, and total lock brake. Medium duty. Solid cast polyurethan..$15.30 -
4" Hard Rubber Wheel Threaded Swivel Stem Caster w/ Expandable Adapter - 300 lbs. capacity - 21HR40GB8275YY
Durable Superior Casters4" Hard Rubber Wheel Threaded Swivel Stem Caster with Expandable Adapter 4" 1-1/4" Hard Rubber wheel on threaded swivel stem caster, 5" overall height, expandable adapter size 1.360" to 1.4250". Medium duty. Solid Hard Rubber tread & core offers high impact strength. Easy Rolling..$7.40 -
4" Nomadic Wheel Swivel Grip Ring Stem Caster - 260 lbs. Capacity - 21NM40GI4391YY
Durable Superior Casters4" Nomadic Wheel Swivel Grip Ring Stem Caster 4" x 1-1/4" Nomadic wheel, 7/16" x 1-3/8" swivel grip ring stem, and overall height of 5". Medium duty. Non-marking high grade thermo plastic elastomer tread chemically bonded to a polyolefin core. Shock absorbing cushioned ride offers floor p..$7.02 -
4" Nomadic Wheel Swivel Grip Ring Stem Caster w/ Brake- 260 lbs. Capacity - 21NM40GI4391TY
Durable Superior Casters4" Nomadic Wheel Swivel Grip Ring Stem Caster with Top Lock Brake 4" x 1-1/4" Nomadic wheel, 7/16" x 1-3/8" swivel grip ring stem, and overall height of 5". Medium duty. Non-marking high grade thermo plastic elastomer tread chemically bonded to a polyolefin core. Shock absorbing cushioned..$8.40 -
4" Nomadic Wheel Threaded Swivel Stem Caster (1/2") - 260 lbs. Capacity - 21NM40GI4367YY
Durable Superior Casters4" Nomadic Wheel Threaded Swivel Stem Caster 4" x 1-1/4" Nomadic wheel, 1/2" - NC13 x 1" threaded swivel stem, and overall height of 5". Medium duty. Non-marking high grade thermo plastic elastomer tread chemically bonded to a polyolefin core. Shock absorbing cushioned ride offers floor p..$6.94 -
4" Nomadic Wheel Threaded Swivel Stem Caster W/ Brake (1/2") - 260 lbs. Capacity - 21NM40GI4367TY
Durable Superior Casters4" Nomadic Wheel Threaded Swivel Stem Caster with Brake 4" x 1-1/4" Nomadic wheel, 1/2" - NC13 x 1" threaded swivel stem, with brake, and overall height of 5". Medium duty. Non-marking high grade thermo plastic elastomer tread chemically bonded to a polyolefin core. Shock absorbing c..$8.32 -
4" Nomadic Wheel Threaded Swivel Stem Caster (1/2") - 260 lbs. Capacity - 21NM40GI4368YY
Durable Superior Casters4" Nomadic Wheel Threaded Swivel Stem Caster 4" x 1-1/4" Nomadic wheel, 1/2" - NC13 x 1-1/2" threaded swivel stem, and overall height of 5". Medium duty. Non-marking high grade thermo plastic elastomer tread chemically bonded to a polyolefin core. Shock absorbing cushioned ride offers flo..$6.94 -
4" Nomadic Wheel Threaded Swivel Stem Caster W/ Brake (1/2") - 260 lbs. Capacity - 21NM40GI4368TY
Durable Superior Casters4" Nomadic Wheel Threaded Swivel Stem Caster with Top Lock Brake 4" x 1-1/4" Nomadic wheel, 260lbs. capacity, 1/2" - NC13 x 1-1/2" threaded swivel stem, with brake and overall height of 5". Medium duty. Non-marking high grade thermo plastic elastomer tread chemically bonded to a polyolefi..$8.32 -
4" Nomadic Wheel Threaded Swivel Stem Caster W/ Expandable Adapter - 260 lbs. capacity - 21NM40GI4374YY
Durable Superior Casters4" Nomadic Wheel Threaded Swivel Stem Caster with Expandable Adapter 4" 1-1/4" Nomadic wheel on threaded swivel stem caster, 5" overall height, expandable adapter size options available. Medium duty. Non-marking high grade thermo plastic elastomer tread chemically bonded to a polyole..$9.32 -
4" Nomadic Wheel Threaded Swivel Stem Caster W/ Expandable Adapter and Brake - 260 lbs. capacity - 21NM40GI4374TY
Durable Superior Casters4" Nomadic Wheel Threaded Swivel Stem Caster with Expandable Adapter and Brake 4" 1-1/4" Nomadic wheel on threaded swivel stem caster, expandable adapter, brake, 260lbs. capacity, and 5" overall height. Medium duty. Non-marking high grade thermo plastic elastomer tread chemicall..$10.70 -
4" Nomadic Wheel Threaded Swivel Stem Caster W/ Expandable Adapter and Total Lock Brake - 260 lbs. capacity - T3NM40GI4374YY
Durable Superior Casters4" Nomadic Wheel Threaded Swivel Stem Caster with Expandable Adapter and Total Lock Brake 4" 1-1/4" Nomadic wheel on threaded swivel stem caster, expandable adapter, total lock brake, 260lbs. capacity, and 5-1/8" overall height. Medium duty. Total lock brake locks the wheel from..$12.36 -
4" Polymadic Wheel Swivel Grip Ring Stem Caster - 325 lbs. Capacity - 21PM40GM4391YY
Durable Superior Casters4" Polymadic Wheel Swivel Grip Ring Stem Caster 4" x 1-1/4" Polymadic wheel, 325lbs. capacity, 7/16" x 1-3/8" swivel grip ring stem, and overall height of 5". Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically locked onto an injection molded polyolefin..$7.02 -
4" Polymadic Wheel Swivel Grip Ring Stem Caster W/ Top Lock Brake - 325 lbs. Capacity - 21PM40GM4391TY
Durable Superior Casters4" Polymadic Wheel Swivel Grip Ring Stem CAster 4" x 1-1/4" Polymadic wheel, 325lbs. capacity, 7/16" x 1-3/8" swivel grip ring stem, and overall height of 5". Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically locked onto an injection molded polyolefin..$8.40 -
4" Polymadic Wheel Threaded Swivel Stem Caster (1/2") - 325 lbs. Capacity - 21PM40GM4367YY
Durable Superior Casters4" Polymadic Wheel Threaded Swivel Stem Caster 4" x 1-1/4" Polymadic wheel, 325lbs. capacity, 1/2" x 1" coarse threaded swivel stem, and overall height of 5". Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically locked onto an injection molded ..$6.94 -
4" Polymadic Wheel Threaded Swivel Stem Caster W/ Brake (1/2") - 325 lbs. Capacity - 21PM40GM4367TY
Durable Superior Casters4" Polymadic Wheel Threaded Swivel Stem Caster with Top Lock Brake 4" x 1-1/4" Polymadic wheel, 1/2" - NC13 x 1" threaded swivel stem, with brake and overall height of 5". Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically locked onto an injection..$8.32 -
4" Polymadic Wheel Threaded Swivel Stem Caster (1/2") - 325 lbs. Capacity - 21PM40GM4368YY
Durable Superior Casters4" Polymadic Wheel Threaded Swivel Stem Caster 4" x 1-1/4" Polymadic wheel, 1/2" - NC13 x 1-1/2" threaded swivel stem, and overall height of 5". Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically locked onto an injection molded polyolefin core; ta..$6.94 -
4" Polymadic Wheel Threaded Swivel Stem Caster W/ Brake (1/2") - 325 lbs. Capacity - 21PM40GM4368TY
Durable Superior Casters4" Polymadic Wheel threaded Swivel Stem Caster with Top Lock Brake 4" x 1-1/4" Polymadic wheel, 1/2" - NC13 x 1-1/2" threaded swivel stem, with brake and overall height of 5". Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically locked onto an injec..$8.32 -
4" Polymadic Wheel Threaded Swivel Stem Caster W/ Expandable Adapter - 325 lbs. capacity - 21PM40GM4374YY
Durable Superior Casters4" Polymadic Wheel Threaded Swivel Stem Caster with Expandable Adapter 4" 1-1/4" Polymadic wheel on threaded swivel stem caster, 5" overall height, expandable adapter size options available. Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically ..$9.32 -
4" Polymadic Wheel Threaded Swivel Stem Caster W/ Expandable Adapter And Brake - 325 lbs. capacity - 21PM40GM4374TY
Durable Superior Casters4" Polymadic Wheel Threaded Swivel Stem Caster with Expandable Adapter and Brake 4" 1-1/4" Polymadic wheel on threaded swivel stem caster, expandable adapter, brake, and 5" overall height. Medium duty. High performance UV resistant, liquid cast polyurethane elastomer; mechanically lo..$10.70 -
4" Polymadic Wheel Threaded Swivel Stem Caster W/ Expandable Adapter And Total Lock Brake - 325 lbs. capacity - T3PM40GM4374YY
Durable Superior Casters4" Polymadic Wheel Threaded Stem Caster with Expandable Adapter and Total Lock Brake 4" 1-1/4" Polymadic wheel on threaded swivel stem caster, expandable adapter, total lock brake, and 5-1/8" overall height. Medium duty. Total lock brake locks the wheel from turning and locks th..$12.36 -
4" Semi-Steel Wheel Swivel Stem Caster (1/2") - 300 lbs. Capacity - 21SS40GS8267YY
Durable Superior Casters4" Semi-Steel Wheel Swivel Stem Caster 4" Semi-Steel wheel, 1/2" coarse 13 x 1" stem, plain bore, and overall height of 5". Semi-Steel Cast iron offers a strong durable, cost effective solution for heavy loads. Hard tread rolls easily and offers high abrasion resistance. Tread face ..$6.90 -
4" Semi-Steel Wheel Swivel Stem Caster (1/2") - 300 lbs. Capacity - 21SS40GS8268YY
Durable Superior Casters4" Semi-Steel Wheel Swivel Stem Caster 4" Semi-Steel wheel, 1/2" coarse 13 x 1-1/2" stem, plain bore, and overall height of 5". Semi-Steel Cast iron offers a strong durable, cost effective solution for heavy loads. Hard tread rolls easily and offers high abrasion resistance. Tread face is..$6.90 -
4" Thermo-Pro Wheel Swivel Grip Ring Stem Caster (7/16") - 250 lbs. Capacity - 21TP40GY4791YY
Durable Superior Casters4" Thermo-Pro Wheel Swivel 7/16" x 1-3/8" Grip Ring Stem 4" x 1-1/4" Thermo-Pro wheel (non-marking thermoplastic roung rubber tread), swivel grip ring stem, and overall height of 5". Light medium duty. Non-marking Thermoplastic rubber tread is permanently bonded to Polyolefin core. Shock absor..$6.08