4 Pack, Simple Adjust Pop Up Gear Driven Rotor, Spray Distance From 26' To 38', Easy Arc & Radius Adjustment On Top Requires Only A Flat Blade Screwdriver, Adjustable Spray Pattern Nozzle 40 To 360&degree., With Rain Curtain Technology, Part Circle & Reversing Full Circle Rotation, Radius Adjustment Screw Up To 25% Reduction, 4" Pop Up To Clear Tall Grass, 3/4" Inlet.