The regulator blast shield is used in conjunction with our regulator brake system. It is internally threaded 1-3/16×24 (1.1875×24). this Blast Shield features front cut outs to tighten the blast shield on and off of your brake. We offer both a 2.75″ and an extended 4.0″. The blast shield is available in raw, gloss, matte black, and carnivore coat.