A brass pigtail with a CGA 540 nut and tailpiece assembly at each end that connects to either a CGA 540 manifold tee or CGA 540 storage valve. Provided Oxy-Clean for oxygen service to 3000 psi. Additional Info: To join a series of commercial gas cylinders of the same CGA type, MANIFOLD TEES and PIGTAILS are needed. These are usually made of brass and copper, although stainless steel is sometimes needed at high pressures or in marine environments. TEES attach directly to the CGA tank valve,...