Rain Bird SW20/10PK spot watering emitter. 2.0 GPH pressure compensating emitter ideal for watering root zones of plants, trees, and container plantings. Convenient re-sealable zip lock plastic bag contains 10 emitters. They can be used in-line with 1/4" tubing or inserted into the side wall of 1/2" distribution tubing. Rain Bird pressure compensating design ensures that each plant receives the desired watering rate regardless of placement along the distribution tubing. Exclusive self-piercing barb simplifies installation; pierce hole and install emitter in one easy step with the Rain Bird Emitter Tool ET-1 (not included). Pressure-compensating design delivers uniform flow throughout a wide pressure range (15 to 50 psi; 1.0 to 3.5 bar). Outlet barb securely retains 1⁄4" Distribution Tubing. Self-flushing action minimizes clogging. Robust design made from highly inert materials that are resistant to chemicals. Durable UV-resistant plastic construction. Rain Bird emitters are color coded to easily identify flow rate. Available in other watering rates: 0.5, 1, 5.0 GPH to allow customizing flow to different plant types and sizes.