<ul><li>Brass with PTFE coated, resistance</li><li>Thread: 1/2;-20UNF; Length: Approx. 18mm / 0.71inch</li><li>This is standard seat scuba tans, except some brands</li><li>Nylon66 insert for nitrox service</li><li>Smooth and</li></ul> Description: - This is standard seat scuba tans, except some brands - Smooth and - Nylon66 insert for nitrox service - Brass with PTFE coated, resistance - Thread: 1/2;-20UNF; Length: Approx. 18mm / 0.71inch Package Includes: 1 Piece Scuba Seat Assembly (Others are not included) Note: Installation/disassemble of the tan must be operated by trained and certified avoid any injury or death. Strongly recommends that you proper training prior to maintenance for service. Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!

Baosity Scuba Diving Dive Tank Valve Seat Assembly Resistance &