The 1/4 in. Barbed Cross connects four sections of 1/4 in. supply tubing or dripline for a "+" intersection. It also connects three 1/4 in. branches to a punched hole in any size supply line. To install, insert the single-barbed tee inside the drip tubing opening and anchor in place (Tip: soften the tubing end so it's easier to work with by soaking in hot water or leaving out in the sun for pliability).