The Grainger 1/2" Black Rubber Bumper is a rubber bumper with a 1/2" diameter and 1-1/4" length. It has a hole diameter of 1/4" and is made of SBR rubber. This bumper absorbs shock and reduces noise from vibration. It can be used on bins, carts, conveyors, doors, drawers, and more. The operating temperature range is -20°F to +180°F. It meets military specification MIL-P-15011C. This bumper comes in a convenient pack of 50 pieces.