An inexpensive way to split your co2 gas line to multiple taps. Works with 5/16" tubing best, barbs on this CO2 Tee are 5/16", use hose clamps to secure.,A quick tip is to put the end of the tubing in 100-120F water for a minute to soften the tubing. We suggest work gloves when putting tubing onto this product as the ends can be sharp.