Easy to use: Red handles for adjusting or completely shutting off water, easy to use Operation: Self-piercing use with 1/2 inch drip hose or insert into drip hose greater dripping; Fits most 1/2 inch tubing: approx. Range from 520 to 550 ID Good helper for planting: effective way to control the water flow of individual plants, planting pots, garden greenhouse, flower bed, patio or a lawn Quality material: impact-resistant and corrosion-resistant plastic materials to ensure a long service life Fits most 1/2 inch tubes: approx. . 520 - 550 ID range, high impact plastic construction, suitable for controlling water flow to individual plants, planting containers, garden greenhouse, flower bed, patio, lawn. Features : Compatible with 1/2 tubing or drip lines. Corrosion resistant and impact resistant plastic. Made of low polyethylene linear density. Safe and easy installation without glue, tools or pliers. Recommended for 0 to 50 PSI operating pressure. Barbed ends grip the tubing for a tight, secure connection. Installation Tips: To use the fittings with a drip tube, push the tube very firmly onto the barb side of the the switch, connector, tee or elbow for a very tight fit that will not leak. Soften the tube before installing the fitting, you can let the tube sit under the hot sun or Briefly apply a hairdryer to the end of the tube before inserting the fitting. Package includes: 8 x Switching valve