Mustang Rearm Kit (Auto) for MD3031 For Model numbers: MD3001, MD3002, MD3031, MD3032 Contains: one 33 gram CO2 cylinder, one green inflator pin, one bobbin, one re-arming instruction manual. Use only Mustang Survival re-arm kits. Use of other re-arm kits result in improper operation or failure to operate Mustang Survival products are warranted to be free from defects in materials This item is not for sale in Catalina Island Workmanship for one year after the date of purchase.Products which, in our judgment, have received excessive Abusive use will not be covered by this warranty.