Features Water Separator, Oil Separator, Pressure Regulation, Compact Design. Type Air Pressure Regulator With Water & Oil Separator. ????1 × Air Pressure Regulator with Water & Oil Separator. ????1/4" Small Spray Gun Spray Gun: Standard 1/4 thread is suitable for most spray guns; It is made of aluminum alloy + plastic + stainless steel adapter material, sturdy, sealed, non-water, no air leakage; It is ideal for compressed air spray gun.