Having the right stuff in your Save-a-Dive Kit can make the difference between a Great-Dive and the Worst-Day-of-Diving you ever had. Watching everyone else swimming out from the beach or making a giant stride entry off the back of the boat and you're just sitting there with a bad Valve to Regulator O-Ring. This is something that can be prevented if you come prepared. Always carrying spares of the Easily-Replaceable-Parts can make this nightmare never happening to you. Have plenty of Spare O-Rings on hand in your Save-A-Dive Kit. The #R014 Cylinder Valve O-Ring is a Durable Buna-N Rubber Material. This O-Ring is the most common Regulator-to-Valve O-Ring used on Valves to date.