Check the listing for details. 4PCS/SET 33 gram CO 2 Rearming Cylinder for Inflatable Life Jacket Replacement. Condition: New without tags. Listed at 36.10 USD. ITEM DESCRIPTION This is a premium quality re-arming CO2 kit/cylinder/cartridge for /manual version of inflatable jackets, life vests, waist belt packs, or personal flotation device (PFD). It fits lifejackets that take 1/2-inch thread CO2 cartridges. Automatically inflates upon immersion in water or when the wearer pulls the inflation handle. For replacement CO2 cartridge, use our premium rearming kit. Features and Benefits: This CO2 rearming kit inflates your auto/manual version of inflatable lifejackets. Premium quality, heavy-duty, easy to install and remove. Fits various size inflatable lifejackets with 1/2-inch thread cylinder. Fast shipping from our USA warehouse. Great customer service. CO2 size and flotation/buoyancy reference: 33g = 150N (for adult lifejacket) (Important: To ensure 100% compatibility, please make sure your lifejacket takes 1/2-inch thread CO2 cartridges. And it’s always recommended to buy the CO2 rearming kit from the same seller that you bought your lifejacket/life vest from) Reminder: This cylinder is one-time use only. Since it is hard to be transported, we suggest you to buy 1 or more extra CO2 recharge set while purchasing the inflatable life jacket at the same time.