Every once in a while your hot rod will throw the blower belt off bending up your blower belt guard. RBS carries a full supply of parts to help keep the racer going down the track and winning rounds. The RCD heavy duty blower belt guard uses two different type spacers so measure for the one you need and spacers are sold individual. Spacers are made from billet alum. to help keep your hot rod lightweight and anodized black for corrosion protection. Spacers measure .050" x 1.87" or .062" x 1.75".