Rearming kits are essential as they add another season of use to your inflatable life jacket. This Leland Automatic PFD Rearming Kit contains one 38-gram CO2 cylinder with 1/2" threads, a yellow bobbin/water sensing element, and step-by-step rearming instructions. Make sure to check your inflatable life jacket owner's manual and the rearming kit ensuring they are a match. Using the wrong rearming kit can be dangerous.• For rearming inflatable life vests• Use with automatic / manual pull PFD devices• Includes one 38-gram CO2 cylinder with 1/2" threads, yellow bobbin/water sensing element, and instructions• UL marine classifiedCAUTION: This product can only be used one time. Once the CO2 cartridge is punctured to inflate the vest, it must be replaced. Use only with specified PFD models. This gas cylinder is under pressure; therefore, misuse can be dangerous. Do not incinerate, expose to sun or store above 120°F. Do not throw into open fire or dump at sea. Keep away from children. Dispose of gas cylinders only when empty. Discharge and dispose of corroded or rusty cylinders. For use with automatic / manual pull PFD devices UL marine classified | Leland 38-Gram Automatic Inflatable Life Vest Rearming Kit with 1/2" Threads in Yellow