This General Pump Quick Connect Pressure Washer Detergent Injector features a hardened steel nipple for up to 4500 PSI. Max. PSI: 4,500, Max. Degree Detergent ( deg F): 200, Material: Brass, Orifice Size: 1.8mm, Flow (GPM): 3.0, Female Inlet (in.): 3/8, Male Outlet (in.): 3/8