Impact sprinkler Water saving distance control dial adjusts for 25 ft to 41 ft radius PJ spray guiding arm controls water stream and prevents side splash onto buildings and walkways Weighted arm for slower rotation and better water coverage Straight through water flow design for superior dirty water performance Diffuser screw breaks water into smaller water droplets for uniform watering 8 step spike Ideal for medium to large watering areas Full or part circle operation with easy adjustments Plastic