This General Pump Quick Connect Pressure Washer Detergent Injector features a hardened steel nipple for up to 3500 PSI. Female Inlet: 0.375 in, Male Outlet: 0.75 in, Max. Degree Detergent: 200 °F, Max. PSI: 3,500, Orifice Size: 2.3 mm Adjustable control2.3mm orifice for pressure washers up to 8.0 GPMFor cold or hot water applications, up to 200°F3/8in. inlet/outlet