This Homebrew Kegging System Includes: - TapRite Dual Gauge Regulator - Four used 5 gallon Ball Lock Corny Kegs - 4-way Gas Manifold with 6 feet of thick wall gas line from the manifold to the regulator, 6 feet of thick wall gas line on one of the manifold shutoff valves and 3 feet of thick wall gas line on the other three shutoffs, all ending with MFL gas disconnects and threaded hose barbs - Pressure Relief Valves - Four MFL picnic tap assemblies each with 4 feet of beer line (As of 2-17-2014 we are throwing in a set of O-rings for each keg with every purchase of this kegging system.) This system should be run at 6 PSI. The gauge guard is a great way to protect your regulator and highly recommended here at AIH, please see our options! Our CO2 tanks speak for themselves. If you can rent one locally, go for it. If not...we have some darn good prices! Full Set of instructions is now available online to save paper: Homebrew Kegging System Ball Lock(PDF) We know some homebrewers are more picky than others, so please keep in mind that these are USED kegs. Some of these kegs are probably 30 years old. Do not expect new kegs. If you are looking for new kegs, please check out our new kegs. We try and have quality kegs available at all times. With this said, they are going to show normal wear and tear. We are not implying that our kegs are not quality...we just want to avoid any misunderstandings. If you are unhappy with your used 5 Gallon Cornelius Kegs for any reason, we will gladly take them back. The purchaser will be responsible for return shipping charges.