Attributes . Machined components are manufactured using solid bar stock; Stainless steel balls, retaining rings and springs maximize corrosion resistance and extend service life. Steel componentry is plated using ROHS Compliant Trivalent Chrome. Steel coupler sleeves are hardened to resist deformation and maximize service life. Couplers have polyurethane valve stem O-Ring, with a temperature range of -65? to +212?F; Ancillary coupler seals are Nitrile (Buna-N), with a temperature range of -40?F to +250?F; PTFE or TPC-ET Anti-Extrusion ring protects main coupling valve seal from dynamic impulse pressure damage. . Names