This regulator has two gauges, A WYE with 2 shutoff check valves attached. It is set up for 5/16" air hose (industry standard) and a pressure relief valve. Comes with Washer, ready to attach to CO2 Tank. Be sure when you look at regulators that you purchase one with check valves. This will eliminate your beer from flowing from one keg to the other or into the regulator itself. I also sell hose (5/16 red air hose) and Stainless worm Clamps. We build and test these high quality regulators in house using an American made body and other high quality componants.