The 1/2 in. MPT 700 Series Compression Adapter connects to 1/2 in. FPT connection point on one end and 700 Series supply tubing or dripline (0.680 in. to 0.704 in. OD) on the other end. Tubing is inserted into the black compression ring. An internal barb compresses into 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.