Gilmour Metal Impulse Sprinkler on Zinc Spike Base 967HZS Water coverage up to 5800 sq. ft. (86 ft. diameter) Provides full or partial coverage. Patented impulse arm saves water by eliminating back and side splash. Diffuser screw allows easy fingertip adjustment of water stream for even coverage. Long lasting brass and zinc construction on impulse head. Impact resistant, rustproof polymer sled base.