Cartridge for dispenser sold individually You are currently ordering on our website and you need a CO2 cartridge? Do not hesitate any longer and choose this 16G CO2 Cartridge sold individually. A CO2 refill cartridge is necessary for unpressured or so-called standard 5L Kegs such as the mini-kegs Meteor, Anosteké, Pietra. We usually use one cartridge per keg. The use of this cartridge allows you to store the beer up to 3 weeks instead of just a few days (2 or 3 if you don’t add the cartridge to the beer). Other CO2 refill cartridges are available for your beer dispensers.