Material: Brass and rubber gun adapter and quick connector, brass nozzle, fine workmanship. Easy Connection: One end of the pressure washer gun adapter connects to a pressure washer nozzle tip or foam cannon with a 1/4" connector. The other end is inserted into the gun and the connector turned clockwise. Updated Accessory: Compatible with Karcher K2-K7 converts to 1/4" quick connect female. Durable Quality: The adapter consists of a sturdy plastic and quick release brass socket. Working pressure up to 2000 psi. Working temperature up to 60C. 1/4" Quick Connector Design: The 1/4" female quick connector is made of brass to prevent rust and corrosion. The 1/4" snap-on design allows for faster application and is easy to attach and detach.