Gilmour Polymer Impulse Sprinkler with Built-in Timer 993TD Teal Patented impulse arm saves water by eliminating back and side splash. Provides full or partial coverage Diffuser screw allows easy fingertip adjustment of water stream for even coverage. Dial selects up to 5 hours of watering or up to 3/8 ich of water on lawn. Wide heavy-duty polymer sled base for stability. Water saving design.