This General Pump Quick Connect Pressure Washer Detergent Injector features a hardened steel nipple for up to 4500 PSI. Flow (GPM): 5.0, Material: Brass, Orifice Size: 2.1mm, Max. Degree Detergent ( deg F): 200, Female Inlet (in.): 3/8, Max. PSI: 4,500, Male Outlet (in.): 3/8