These Stainless Steel T shaped joiners have a 1/4" barb on all ends for splitting our standard beer and gas line into two outlets / inlets.
Use it to split a gas line from 1 regulator to two outlets so you can force-carbonate or dispense from 2 kegs at the same time from a single regulator.
We recommend using some line clamps to ensure there is no leakage for the barbed connections.