The only thing worse than a premature inflation? One that doesnt inflate at all. Keep your inflatables ready to pop at any time with fresh cartridges on hand. The Auto/Manual 16g Bayonet Inflatable Re-Arm Kit contains everything necessary to re-arm your Mustang Survival MIT 70 manual and automatic inflatable PFDs after deployment. The automatic inflator bobbin on all automatic PFDs should be replaced on a regular basis. Use only Mustang Survival re-arm kits. Use of other re-arm kits may result in improper operation or failure to operate and will void the product’s warranty.Re-arm kit contains:One 17 gram CO2 cylinder and bayonet assemblyOne bobbin (used for automatic PFD models only)Re-arming instruction manual