RM8501 1/2" Full Circle,Low angle, low volume sprinklers1/2"Bearing: 1/2" Male NPT, Plastic. Trajectory Angle: 5°.OPERATING RANGES Operating Range: 14.5 - 43.5 psi Flow Rate: 1.82 - 6.13 GPM Radius:13.95 - 24.60 ft. Operating Range: 1.0 - 3.0 bar Flow Rate: 0.08 - 0.27 m3 / h Radius: 4.25 - 7.50 m.