This is the Sherwood Pro Valve for Scuba Tanks Features: Sher-Grip handwheel Triple chrome plating with satin finish Teflon seals Compatible with both standard and DIN regulators Yoke insert included Valve Thread Size: 3/4-14 NPSM Nitrox Compatible to 40% (The Recreational Limits of Nitrox) The Sherwood Pro Valve boasts a Sher-Grip handwheel, triple chrome plating with a satin finish, Teflon seals, and compatibility with both YOKE and DIN regulators. A yoke insert is included in the valve that can be removed to convert it into a DIN valve, the valve thread size is 3/4-14 NPSM. It is also Nitrox compatible up to 40%, making it suitable for recreational diving.