NPT Compliant: These 3/8-inch quick connect couplings are NPT compliant to compatibility with existing installations. Check the specs for seamless integration with most NPT-compliant equipment for a leak-free experience. EASY TO ASSEMBLE AND CONNECT: The kit includes male and female quick couplings that are easy to assemble by hand for quick and safe connection of hoses, pumps, ball valves and more. Ideal for quick installation and removal in a variety of applications. : These pressure washer adapters are made of high quality stainless steel, which provides greater resistance to rust and than brass materials. This rugged material ensures and maintains a colorfast appearance. HIGH PRESSURE : These quick couplings can withstand pressures up to 5000-6000 PSI, making them ideal for high pressure applications. They provide a reliable, solid connection for safe and efficient operation., Manufacturer: Ounfhtrttk