Rain Bird SW20-10PS Drip Irrigation Spot Watering Dripper/Emitter, 2 Gallon Per Hour, 10-Pack 2.0 gallon per hour pressure-compensating emitter delivers same uniform flow rate from beginning to end of tubing runs Slow watering rate allows soil to absorb water more completely in the root zones of plants Self-piercing design; use with 1/4" Drip tubing or insert into 1/2" or larger Drip tubing Large water passages and self-flushing action help prevent clogging Constructed of highly durable UV and chemical-resistant materials to assure long life Plastic bag contains (10) 2.0 gallon per hour dripper/emitters