CO2 cartridge rearming kits for inflatable PFDs. Match the kit to your specific life jacket model, since rearming kits are not universal. Most kits include the correctly sized CO2 cartridge, replacement bobbin (the spring-loaded mechanism that punctures the cartridge when the inflator is triggered), and instructions for the rearming process. We carry rearming kits for the most common inflatable PFD brands. Contact us with your jacket model number for compatibility confirmation.