Keeping you Ready for the Road Ahead , the Stoughton Steel Lip Crossmember Threshold Plate is a corrosion-resistant and durable component made of aluminum. It features a tread pattern design that provides enhanced slip resistance and traction. This ensures a safer entry and exit from your truck or trailer. This exterior crossmember replacement is 24" long, providing versatility in truck body and trailer designs. Experience a top-quality component designed to withstand the toughest conditions. FleetPride is your First Click in Heavy Duty .