The Spinlock Elite Lifejacket 275N Re-Arming Kit includes a 60g CO2 cylinder and firing head. This kit is compatible with Spinlock Deckvest 5D 275N, Deckvest 6D 275N, and Spinlock DURO 275N Lifejacket Harnesses purchased from August 2018 onwards. If you have a different brand of lifejacket that uses the UML ELITE inflator system with a 275N bladder, this re-arming kit is also suitable for your needs. Please double check the fitting of your lifejacket to determine the correct model required.