You're out on a dive and you're mounting your dive regulator onto the cylinder valve, and when you pressurize the system you hear a pressure leak. Don't let a damaged O-Ring make you abort a dive; always carry spare O-Rings on every dive. This Mini Dry Box save-a-dive kit can come in handy when you need an O-Ring, Kit has 10 piece of O-Ring and is very convenient due to its compact size. Kit includes most commonly used cylinder valve, regulator hose and pressure gauge air spool O-Rings. The Kit Case is made from corrosion resistant anodized aluminum with a threaded O-Ring sealed cap and is equipped with a split ring for easy attachment to gear. Kit is available in multiple colors and the dive you save may just be your own!