The Onyx(R) M16 16-Gram Inflatable Belt Pack Rearming Kit keeps your Manual Inflatable Belt Pack performing like new and ready for anytime inflation. Keep a spare or 2 on hand to be ready for any adventure or emergency. This 16-gram CO2 cylinder with a green tab takes up nearly no space yet provides a potentially lifesaving service. The Onyx M16 16-Gram Inflatable Belt Pack Rearming Kit lets you get the most out of your belt pack with OEM quality for confidence and peace of mind. Includes one 16-gram CO2 cartridge with 3/8"" thread, green indicator tab and instructions. Keeps your belt pack performing like new. Features & Design: Includes one 16-gram CO2 cartridge with 3/8"" thread, green indicator tab and instructions Takes up little space OEM quality