This heavy-duty Rain Bird pop-up impact sprinkler is noted for its long-lasting, trouble-free performance with hard water and heavy mineral content that can clog and corrode other sprinklers. It is easy to adjust and comes with 5 extra nozzles to customize watering rate.Simple, straight-through flow design for great performance in dirty waterDiffuser screw breaks water into smaller droplets for uniform wateringPop-up height clears tall grassHeavy-duty rolled-lip design prevents vegetation from growing into the caseGritproof bearing for reliable operation