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. Tubular 'TV' valves are constructed from steel bar stock and are designed for optimum performance in pneumatic applications. Nitrile (Buna-N) seals are standard; All couplers incorporate a PTFE anti-extrusion ring to protect the seal components from dynamic impulse damage. Valve seals are crimped in place to maintain integrity during excessive flow conditions and pressurized connection. . Names