This Vestil TB-10 trailer/crane bumper is 6" in length, 2-1/2" wide, and is used to prevent damage to a loading dock from a trailer or crane. The pad has a depth of 3-1/2" and is made of Fiber reinforced prime rubber containing nylon resists abrasion, impact, wear and corrosion. The material is fabric-reinforced with nylon and polyester for strength and dimensional stability. This bumper has pre-drilled, countersunk 1/2" mounting holes for easy installation.