The Alum-Line All Aluminum Cab Guard Semi Cab Protectors are built with the same design, quality materials, and workmanship as all of our aluminum products. When weight, maintenance, and strength are considered, nothing compares to the Alum-Line Cab Guard Semi Cab Protectors. You can't go wrong with these heavy duty Semi Cab Protectors. The All Aluminum Cab Guard Semi Cab Protectors are proven performers in rugged use. With Alum-Line you get a professional, aluminum look with style and strength. Our 6" I-Beam mounting sills are the strongest in the trucking industry. With the strong and durable all aluminum construction of the Cab Guard Semi Cab Protectors, you will be fully satisfied.