The Auto Hydrostatic Re-Arm Kit contains everything necessary to rearm your Mustang Survival Auto Hydrostatic inflatable PFD after deployment. Use only Mustang Survival rearm kits. Use of other re-arm kits may result in improper operation or failure to operate and will void the product’s warranty. 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. Contains an Auto Hydrostatic Inflator, which includes: One 24-gram CO2 cylinder/inflator body, inflator cap with metal pull handle, metal key and re-arming manual. Kit is compatible with inflatable PFD model numbers: MD5183, MD5183 BC, MD5183 KF, MD5153, MD5153 BC, MD5153 KF (see SKU’s: MSTM5183BC and MSTMD5183).