Genuine Innovations Cornelius Keg CO2 Charger. The Genuine Innovations Cornelius Keg CO2 Charger is the ideal tool for any home brewer using Cornelius kegs. Our keg charger, which can fit inside your pocket, eliminates the need for cumbersome CO2 tanks, regulators and hoses. It is very easy to use. Just drop a food grade 16 or 12 gram non-threaded CO2 cartridge into the cup and screw the cup onto the valve head. Next, connect the charger by threading it directly onto the quick disconnect valve (both ball-lock and pin-lock 1/4 MFL threaded inputs will work with this unit, not included). You can easily control the flow of CO2 into the keg by pressing the finger trigger then stop the flow by releasing the trigger. Any remaining CO2 left in the cartridge can be saved for later use. Completely controllable CO2 flow trigger. Small & portable - handheld unit fits in your pocket. Great for parties, tailgating, family reunions, at the cottage, on the boat, camping, wherever you want to take your keg. Works great in your fridge too. All brass inner valve parts will insure years of reliable service. Comes with one 16 gram non-threaded CO2 cartridge (also works with 12 gram non-threaded cartridge). Pressurizes any 3 or 5 gallon corny keg. 2 or 3 cartridges will empty a fully carbonated (artificial or primed) 5 gallon Cornelius keg. Includes one 16g cartridge.