Edelmann Air Brake System Bulkhead Couplings features brass construction, 1" male NPT X 3/8" female NPT threads; and a 1.31 inch length. Designed for use with copper tubing. Use in temperatures ranging from -40 F to +200 F, and working pressures up to 150 PSI. Ideal for use on air brake and cab air control systems. Meets DOT FMVSS571.106 specifications and SAE J246 and J1131 standards. Founded in 1909 by Eric Edelmann to provide parts and accessories for the budding automotive industry, Edelmann Manufacturing continued to grow, adding a line of power steering hoses in 1959. The 1970s brought the addition of the Plews division and their lube equipment and air line products to the Edelmann family. Today, Plews & Edelmann is a leading designer, manufacturer and distributor of a broad range of automotive parts and tools sold to the vast majority of mass merchant and retail auto parts stores and wholesale automotive parts and industrial distribution outlets, worldwide.