The Insert Barb Wye X 1/2 in. MPT fitting has two 17mm barbed ends to connect to tubing or dripline, and a 1/2 in. MPT connection point which screws onto a 1/2 in. FPT connection point such as the threaded end of pipe. This insert wye fitting is made of acetal treated with UV inhibitors to prevent fading and cracking.