Sherwood K-Valve SSV-48P Tank ValveSherwood Valves are the most used valves in diving. Sherwood Valves can be found on cylinders on every continent. The critical link between your regulator and tank, our patented Sherwood valve was designed specifically to handle todays high performance regulators. Sherwood valves are available in both Pro Valve (DIN K) and K Valve. FEATURES Teflon coated plug threads for superior lubrication, dry lubrication means you never have to apply grease. A