Manufactured from fiber reinforced prime rubber containing nylon and polyester Global Industrial; Trailer & Crane Bumper is ideal for protecting trucks and loading docks from high-impact damage. Each model is pre-drilled with 9/16 diameter countersunk mounting holes for easy installation using 1/2 diameter anchor bolts. The bumper is lightweight, durable and built to withstand the elements while still being economical. Installation hardware sold separately.