Material Brass and rubber gun adapter and quick connectors, brass and stainless steel spray nozzles, exquisite craftsmanship. Model Pressure washer gun adapter only compatible with Krcher K2, K3, female quick connect and spray nozzle only 1/4", please note the size before plugging in. 1/4" quick connect design - The 1 internal thread quick connect /4" is made of brass which can prevent rust and corrosion. The 1/4" quick release design allows for faster application, easy to connect and disassemble. High EfficiencyThe adapter connects to the pressure washer spray gun with the quick connect and female connector is connected to 1/4" foam gun. Pressure Washer AccessoryConvert to 1/4" quick connect with internal thread. One end connects gun to pressure washer or foam cannon tips with 1/4" connector. The other end is inserted into the gun and twist the adapter clockwise. Number of shipments: 1 pcs