Technical characteristics: Sprinklers outer diameter: φ102 nozzle inner diameter:? Φ100 nozzle surface curvature of:? 78 ° nozzle aperture:? Φ0.5, a total of 121 holes, one in the middle, which is a total of 12 laps hole pitch 30 ° , a total of 24 laps out of four holes, spaced 15 ° water capacity:? 10 ± 5 L / min shell surface water time:? 1 min / m2 spray range:? ± 60 ° from vertical or vertical? ± 180 °? All parts are stainless steel or brass