Gilmour 167MMS Metal Pulsating Sprinkler Head On Zinc Spike Type: Sprinkler Head Coverage Area: Up to 5800 sq. ft. (86 ft. diameter) Sprinkler Head Type: Impulse Base: Spike Head Material: Brass and Zinc Features: Impulse arm saves water by eliminating back and side splash Diffuser screw allows for easy fingertip adjustment of water stream for even coverage Provides full or partial coverage Heavy-duty die cast zinc triple spike base with foot step