Party Star Deluxe Tap System Four 5L mini kegs is all you need for one batch of beer. Simply prime your beer with 3 oz. of priming sugar, transfer into the mini keg, and in 2 -3 weeks you are ready to drink Includes:Party Star Deluxe Tapper4- 1.33 gallon mini kegs4- reusable rubber bungsAnd 6 - 16 gram CO2 cartridges (1 per keg use)