DetailsThe Auto Hydrostatic Re-Arm Kit contains everything necessary to re-arm your Mustang Survival Auto Hydrostatic inflatable PFD after deployment. For model numbers: MD3153, MD3154, MD3183, MD3184, and MD3188. 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.