The Trailer Crane Bumper is manufactured from fiber reinforced prime rubber containing nylon to resist abrasion, impact, wear and corrosion. The bumper is impervious to weather damage and have predrilled, countersunk mounting holes for easy installation. Features. Fiber reinforced prime rubber containing nylon resists abrasion, impact, wear and corrosion. Unique design protects docks from trailer damageSpecifications. Size 6 L x 3.5 W. Country of Origin India. Weight 8 lbs