Green Thumb, Metal Impulse Sprinkler, Metal Head On Metal Sled Base, Water Coverage Up To 5,800 SQFT, 86' Diameter, Provides Full Or Partial Coverage, Impulse Arm Saves Water By Eliminating Back & Side Splash, Diffuser Screw Allows Easy Fingertip Adjustment Of Water Stream For Even Coverage, Long Lasting Brass & Zinc Construction On Impulse Head, Heavy Duty Die Cast Metal Sled Base.