Corneilius keg co2 charger. Gives the home brewer the ability to pressurize soda kegs. It is small and portable. Great for parties. Much easier than lugging a co2 cylinder around. Completely controlable co2 flow trigger. All brass inner valve parts will insure years of reliable service. Includes one replaceable 16 gram co2 bulb. One 16 gram bulb will dispense approximately 5 gallons of beer. Threads directly onto threaded gas disconnect.