e-arming kits are essential as they add another season of use to your inflatable life jacket. This Leland kit contains one 33-gram CO2 cylinder with 1/2" threads, green pin and step by step re-arming instructions. Make sure to check your inflatable life jacket&';s owner&';s manual and the re-arming kit ensuring they are a match. Using the wrong re-arming kit can be dangerous. Compatibility: 1st Watch: AI-150A, FW-3300A, FW-330AFlowt: EXP-30MAMustang: MD3001, MD3002, MD3017, MD3019, MD3031, MD3032O&';Rizon: OR-INF-ASeachoice: 85640, 85660, 85840, 85860, 85861, 85863Intl. Safety Products: 085USC15A, 085USC15ASEastern Aero Marine: P01080-103, P01080-203