The Grainger Approved Bumper is a rubber bumper that provides impact absorption and noise reduction. It has a 2" diameter, is 3" long, has a 1/4" mounting hole, and is made of SBR rubber. This black bumper has applications including material handling equipment, conveyors, and dock equipment. It meets ASTM D2000 M4BA710 A13 B13 F17 standards. The operating temperature range is -20°F to 180°F.