DUAL GAUGE REGULATOR: Easily measure PSI and CO2 volume and adjust CO2 output pressure using this dual gauge regulator packed with great features! The top gauge indicates output pressure, while the side gauge tells you what's left in the CO2 tank, so you don't run out of gas during a party. BALL LOCK KEG COUPLERS: The complete ball lock home brew keg tap sets include both gas in and beer out couplers for easy tapping of ball lock Cornelius Pepsi kegs. The gas in comes with a 1/4" nut and 5/16" hose barb already attached, allowing you to quickly connect it to the same size air line that standard draft beer regulators use. The beer out connector has a 3/16" hose barb that connects to standard 3/16" beer line. FAUCETS WITH FAUCET KNOBS: The included beer faucets come complete with durable ABS plastic faucet knobs with a sleek and glossy black finish to put a stylish finishing touch on your new kegerator. OPTIONAL 5 LB. ALUMINUM CO2 TANK: We offer kits with and without the CO2 tank, because many people already have one or would like a larger tank size. All of our brand new tanks are made from high strength aluminum alloy, which is not as heavy as a steel tank and will not rust. METAL BEER FAUCET WRENCH: This beer faucet spanner wrench is an essential tool that allows you to quickly and confidently loosen or tighten shank collars without scratching your faucets.