Control the volume of water released from the emitter with the Valve Assembly. Preassembled for a faster installation, it includes 24 in. of tubing with two 1/4 in. barbed connectors on a 12 in. stake (jet not included). The valve enables flow adjustment with a twist of the tab. Add a barbed microspray emitter to the 1/4 in. tubing, insert 1/4 in. barbed inlet found on the other end of tubing into a punched hole in supply tubing, and place the stake into the ground. The assembly is made of ABS plastic and vinyl treated with UV inhibitors to prevent fading and cracking