CO2 Distributor's are an economical way to run more than one keg off of a single CO2 tank. Each shutoff has its own ball check valve to prevent the flow of liquid into the regulator. This gas distributor is made out of aluminum and offers a one piece construction for easy mounting. Note: Swivel Nuts not included. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.