Protects threaded tank valves from dust, water and dirt during dives and storage. Made from 6061 aerospace aluminum to help maintain your equipment and extend service life. Key benefits Keeps valve internals clean and dry to reduce maintenance and prevent contamination. Preserves valve performance and extends the life of your dive gear. Durable metal construction resists impact and wear better than plastic caps. Product highlights Function: Threaded plug designed to seal and protect tank valves when not in use. Compatibility: Fits tank valves with matching threads (threaded valve types). Material: CNC-quality 6061 aviation/aluminum alloy for strength and long-term durability. Performance: Provides a tight, secure fit to block ingress of dust, sand, and water during transport, storage, or surface intervals. Practical use scenarios Between dives: Screw on the plug during surface intervals or when stowing tanks on a boat to prevent salt spray and debris from entering the valve. Transport and storage: Protect valves during travel or in storage racks to reduce the need for cleaning and service. Maintenance and inspections: Use the plug when performing routine checks or replacing hoses to keep the valve clean and safe. Who it's for Recreational and technical divers, dive instructors, dive shops, and anyone who wants to protect and preserve threaded tank valves and extend the life of their underwater equipment.