Toro 53621 Blue Stripe Drip NGE 1.0 GPH Emitters Sprinkler (6 Pack) Pressure compensating for uniform watering in uneven terrain or with pressure fluctuation. Easy to install and reusable.Built-in dust cap. 8-60 psi operating pressure. Water flow: 1.04 G (3.8 L) per Hour @ 30 PSI