The auto hydrostatic re-arm kit contains everything necessary to re-arm your Mustang Survival auto hydrostatic inflatable PFD after deployment. Regular maintenance can reduce the possibility of inadvertent inflation. The auto hydrostatic inflator cap and body should be replaced before the expiry date on the cap passes. Use of other re-arm kits may result in improper operation or failure to operate and will void the product's warranty. IMPORTANT - Recall Advisory Notice for inflatable PFD model numbers: MD3153 (02/LE/T3), MD3154 (02), MD3155, MD3157, MD3183 (02/GS/LE/T2/T3), MD3184 (02) and MD3188. Re-arm kit contains: One 33 gram C02 cylinder/inflator body Inflator cap with plastic pull handle metal key re-arming instruction manual.