Top-adjust arc adjustment requiring only a flat-bladed screwdriver. Rotor comes with a pre-installed 3.0 Rain Curtain nozzle. Water-lubricated gear-driven design for durable, reliable operation. 40 to 360° part-circle arc rotation and reversing full-circle rotation in one. Radius adjustment screw allows up to 35 percent radius reduction without changing nozzles. Dual action, positive stop wiper seal protects internals from debris and assures positive pop-up and retraction. Self-adjusting stator doesnot require replacement when changing nozzles. Arc setting preset at 180° for installation convenience. 19 ft - 32 ft distance of throw. 1/2 in female bottom threaded inlet.