The Restube Automatic Rearming Kit is ONLY for the Restube automatic model. This is an automatic trigger system that activates on contact with water to help keep you safe, providing buoyancy in seconds whenever you need it. 1 Pack Includes: Restube CO2 cartridge Water Activated Arming Cap Secure Clip 6 Pack Includes: Restube CO2 Cartridge (6x) Water Activated Arming Cap (6x) Secure Clip (6x)