ITEM NAME:2Pieces Dive Cylinder Adaptor DIN-to-YOKE Insert Tank Convertor- Diving & Description: Made of chrome plated brass, high tensile strength and corrosion resistance Convert any DIN tank valve to yoke tank so they will fit regulators first stage Polished Surface, with the trait of durability and well appearance Fit for all 200 and 300 Bar DIN tank valves with five nice threads Tank Valve Convert Adaptor comes with two O-Ring; Adapter: G5/8-14 for DIN Specification: Material: Chrome Plated Brass Color: Silver Height: Approx. 0.6inch/1.5cm Outer Diameter: Approx. 0.8inch/21.5mm Inner Diameter: Approx. 0.4inch/1cm Package Includes: 2Pieces Tank Valve Adaptors 4Pieces O-ring Note: Even though this item will fit any DIN tank valves, some valves, made from DIN regulators ONLY, particularly early models might be not suitable. These valves have a bigger head which will NOT fit for a Yoke regulator whether there is an adaptor or not. SKU: ALU0033351419463523.2Pieces Tank Valve Adaptors. These valves have a bigger head which will NOT fit for a Yoke regulator whether there is an adaptor or not. Fit for all 200 and 300 Bar DIN tank valves with five nice threads.