Features: Material: The pressure washer adapter is made of high-quality stainless steel, which is solid and corrosion resistant and can be used for long-time. Easy connection: When replacing the accessories of the pressure washer, the connector is easier to connect or disconnect. You can easily assemble these quick connect plug kits. Ball-lock design: These easy to connect pressure washer joints can form firm connection. Application: The quick coupler kit can quickly connect hoses, pumps, ball-valves, pressure gauges, expansion rods, surface-cleaners and sprayers. The internal thread of quick couplings is 1/4 inch or 3/8 inch. Please check the specification before purchasing. Specifications: Material: stainless steel Type: G 1/4 internal thread/G3/8 internal thread Joint diameter: Approx. 19.5mm/0.77inch Package Includes: 1x Quick Fitting note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color of the item.