ATTENTION: M22 14 swivel fitting has 14mm inside diameter, NOT 15mm. NOT compatible with electric pressure washers from Sun Joe, Campbell, MI-T-M, AR Blue, Stanley, Cleanforce, or Simoniz. If washer requires 15mm, may cause leakage. 8-pack universal pressure washer adapter set includes 4 types of couplers: Metric M22-14 swivel female + 3/8 plug, 3/8 quick disconnect + M22 male, 3/4 female + 1/2 quick connect, 1/2 plug + 3/4 male. Two quick connector sets 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, allowing all 3/4" standard garden hoses to connect to the water inlet of the power washer pump. High-quality replacement couplers provide secure and quick connections, easy to connect and disconnect. Maximum pressure rating up to 5000 PSI.