Check the listing for details. Dura Barb Tubing x MPT Tee Adapter. Condition: New. Listed at 8.84 USD. Please Note: Gray PVC insert fittings are made of the same substances as schedule 40 and schedule 80 PVC are made of. This means a durable long lasting fitting. Insert fittings are normally used with flexible pipe, hose or tubing. Simply slip the barbed insert tip all the way into the end of the flexible pipe, hose, or tubing. Multiple sharp barbs provide a tight grip on the flexible materials to create the seal. It is recommended to clamp over the barbed fittings to provide a reliable leak-proof seal. Proper clamping technique is to place the clamp directly over the barb area and tighten. For additional size specifications see the Spec sheet linked to item page above. The barbed insert x MPT tee adapter has barbs on the tee cross and a male pipe thread connection on the center leg. This can be used in a run of tubing to create a junction with a threaded connection.