The RAINBIRD SW10/10PK A50709F Rain Bird SW10-10PK spot watering emitter. 1.0 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.