This is an authentic OEM replacement part guaranteed to fit the Troy-Bilt and Briggs and Stratton pressure washers listed. This nozzle kit includes one (1) pump-to-hose connection piece and one (1) hose-to-gun connection piece. It connects to both M22 (0.14mm) sized fittings and quick connect fittings. Compatible in pressure washers up to 4000 PSI. This nozzle kit is sold individually.