NAVA DN15 1/2" ZincAlloy Rotary Water Irrigation Sprinkler Gun Nozzle Spray Head Material: Zinc Alloy (Brass Plated) Connection size: DN15 1/2" External Thread Weight: 4.9 OZ (139 g) Working pressure:4.4 -8.8b (2-4.0kg) Jet diameter: 29.5-59.0 feet (9-18m); Flow rate: 3.7-7.1GPM (0.84-1.62 m/h)