This 12” x 3” Mold on Rubber wheel presents a shock absorbing semi-cushioned ride with floor protection and a quiet rolling motion. It rolls smoothly over small debris, rough floors, cracks, floor joints, and other common obstacles. It is optimal for platform and lumber carts. Widely used on commercial dumpsters. Economically priced cushion wheel. Works excellently in outdoor environments; however, cast iron core can rust. Temperature range:-40°F to 180°F.