The industry's high tolerance, high precision, fixed arc nozzle. Captured adjustment screw for radius adjustment. Grey .02 x .02 mesh filter screen. No special tools are required. Compatible with all Hydro-Rain, Rain Bird, and Hunter spray heads and nozzles. Pressure: 15 to 30 PSI; Optimum Pressure: 30 PSI; Radius: 4 x 26-30 Feet.