A CO2 Tee, Chrome Plated Brass is a simple and easy way to split your CO2 gas line to multiple kegs. Works ideally with 5/16″ tubing, barbs on this CO2 Tee are 5/16″, use Oetiker clamps to secure. A trick of the trade is to put the end of the tubing in 100-120F water for a minute to soften it before sliding it on.