This General Pump Quick Connect Pressure Washer Detergent Injector features a hardened steel nipple for up to 3500 PSI. Female Outlet (in.): 3/8 Coupler, Max. Degree Detergent ( deg F): 190, Flow (GPM): 2.0-3.0, Max. PSI: 3,500, Orifice Size: 1.8mm, Material: Brass, Male Inlet (in.): 3/8 Plug