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. Refer to your Owner's Manual for maintenance schedule. The Auto Hydrostatic inflator cap and body should be replaced before the expiry date on the cap passes. 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.• Compatibility: MD3153 02/ MD3153 LE/ MD3153 T3/ MD3154 02/ MD3155/ MD3157/ MD3183 02/ MD3188 Inflatable Life Vest• Inflation Type: Auto Hydrostatic• Includes: With One 33 Gram C02 Cylinder/ Inflator Body Inflator Cap/ Plastic Pull Handle/ Metal key Built To Provide The Ultimate In Convenience And Functionality Easy To Install | PFD - Personal Floatation Device Re-Arm Kit, For Use With MD3153 02/ MD3153 LE/ MD315