Two sets of quick connectors connect the water outlet of the pump to the pressure washer hose, or connect the pressure washer hose to the gun. The other two quick connect kits convert 3/4" threads to quick release fittings, connecting all standard 3/4" garden hoses to the water inlet of the pressure washer pump. Please note: the M22 14 swivel joint has an inner diameter of 14 mm. If the washer needs 15mm, misuse may cause leaks. Does not fit Sun Joe, Campbell, MI-TM, AR Blue, Stanley, Cleanforce, Simoniz electric pressure washers. Replacement couplers provide secure, quick connections that are easy to connect and disconnect . Maximum load: Pressure up to 5000 psi. Features: 4 types of couplers included: Metric M22-14 female swivel thread + 3/8" socket Quick disconnect 3/8" + M22 male. 19 mm (3/4") female + 12.7 mm (12, Socket 1/2 + 3/4 male Usage: Two sets of quick connectors connect the pump water outlet to the pressure washer hose and connect the pressure washer hose to the gun. The