The 3/4 in. MPT 710 Series Compression Adapter is used to connect to a 3/4 in. FPT connection point and transition to 710 Series supply tubing or dripline (0.704 in. to 0.710 in. OD). Tubing is inserted inside the blue compression ring, where an internal barb compresses the tube to hold it in place. This compression fitting is made of ABS plastic and treated with UV inhibitors to prevent fading and cracking.