Two packages of two replacement CO2 cylinders for the CO2 Picnic Tap and CO2 FridgeTap Each cylinder contains 74g of CO2 enough to push and preserve a 14 barrel or more Beverage grade brewery approved CO2 is welded into each cylinder to preserve freshness Features. Reliable and safe. 4 cylinders. Allows consumers to enjoy mobility and ease of use. Uses an economically mass produced Co2 cylinder. A new and unique way to dispense beer or soda using Co2 as the propellantSpecifications. Dimensions 5 H x 6 W x 7 L. Weight 25 lbs