The Netafim 17mm Shut-Off Valve features dual 17mm barbed tubing connectors designed to fit the 17mm UV Poly Tubing. The Shut-Off Valve features a one-piece construction for added strength and is UV resistant making it built to withstand heat, direct sun, and harsh chemicals. The Shut-Off valve is easy to install without any clamps, glue, or tools and forms a tight, leak-proof connection.