Air Distribution Valve Replacement Part — Air Paint sprayer replacement part is not an OEM product, but is remanufactured and engineered to fit the BM gravity fed air spray gun with a maximum paint capacity of 20 oz. and compatible with the BLACK WIDOW 20 Oz. Professional HVLP Gravity Feed Air Spray Gun, Model #56152 and #56153. It features a precision spray pattern for professional results, a Quick Clean gun body for easier clean-up, and a coated interior to prevent material adhesion.It also has precision adjustment control knobs, self-adjusting seals, and a forged gun body with performance grip and high flow air passages.Reviews note that it is lightweight, easy to use, and easy to clean, and that it lays down primer, base, and clearcoats well. 3 pcs/pkg.