brass, this check valves for air compressors offersexceptional durability andlongevity Designed for air compressor enthusiasts and professionals, this check valves provides a perfect replacement for old or defective valves With its quick and tool free installation, the 3 way check valves male thread ensures, making it a must have accessory for any air compressorsetup The 3 way check valves male thread is a high pressure resistant and resistant valves, ensuringoptimal and reliability Whether you ' re working on home improvement projects or industrial applications, this check valves is idealfor hose, air pressure tanks, and compressor piston pumps, Manufacturer: Kaeltsyn