Easy to install: No glue, tools or fixtures are required, Just push the tube firmly onto the barb and tighten the nut. The twist lock increases the tightness of the tube and will not leak. Large butterfly handle, easy to achieve low torque smooth rotation handle.The red handle can be adjusted or completely turned off for easy operation. 1/2 Inch Shut Locking Off Valve - Connect and configure drip irrigation tubing to your desired layout. Fits for drip irrigation fittings for pipes with an inner diameter of 1/2 inch and an outer diameter of 0.6-0.63 (16 mm) tubing. Type: 90 degree elbow Material: Plastic Color: Red and Black Compatibility: Fits for 16 - 17mm Drip Tape Tubing Operating Water pressure: Up to 30 PSI Package Content:10pcs Switch Valve Drip Irrigation FittingsProducts from He Wei's store