The Manual and Automatic Inflatable Re-arm Kit contains everything necessary to re-arm your Mustang Manual Inflatables 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 products warranty.. Features Inflatable PFD Re Arm Kit for MD1166; One 33 gram CO2 cylinder; One green inflator pin; One automatic inflator bobbin (use only with automatic inflatable PFDs only); One re-arming instruction manual; Specifications Weight: 0.6 lbs; .