Add an intersection to tubing or dripline when you connect four sections of tubing with the 17mm Insert Barb Cross. The fitting attaches 17mm supply tubing or 17mm dripline together or connects to a punched hole in the supply line. The barbed ends of the cross fit into the end of tubing and anchors in place. This insert fitting is made of acetal, treated with UV inhibitors to prevent fading and cracking.