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 a temperature range of -20°F to 180°F and meets military specs. It absorbs vibration and shock to protect equipment and components. The bumper's ribbed design provides extra strength. It is well-suited for use as a dock bumper, conveyor bumper, or equipment bumper.