The 1/4 in. Barbed Tee connects three sections of 1/4 in. supply tubing or dripline for a T intersection. It also connects two 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 is easier to work with by soaking in hot water or leaving out in the sun for pliability.) Use fittings to set up a new drip system or expand or repair an existing system. Reusable micro fittings are made of acrylonitrile butadiene styrene (ABS).