Commercial grade CO2 regulator. Two separate regulators to adjust separate keg pressures. This super convenient when you have one keg on tap and want to force carbonate a second keg at the same time. Ball valve with check valve and 3/8 barb to attach to CO2 lines. Nylon washer included to attach to CO2 tank. Hand knobs made it easy to adjust pressure without the need for a screwdriver.