UNDERHILL SI100F IMPACT SPRINKLER: Solid Brass Sprinkler Head with high uniformity nozzles. 1-Inch Full Circle model. Our water sprinklers are ideal to use as a large area garden, yard, lawn, field sprinkler, or golf course sprinkler. SPEED: This commercial-grade lawn sprinkler head pumps at 23 gallons-per-minute (GPM) with a 71 ft. coverage radius. 80 PSI. Range Nozzle 3/16-inch. HEAVY-DUTY: Made from heavy-duty, reliable materials. The yard water sprinkler sprinkler is made from solid brass with a bearing assembly hood for a longer wear life. Straight-flow, low pressure loss. Standard solid brass nozzle included. HIGH-PERFORMANCE: The large area garden sprinkler features stainless steel drive springs and has been designed to provide high-performance year after year and a combination of durability and value available. From a trusted USA-based company. COMPATIBILITY: Our outdoor sprinklers for lawn are compatible with the RollerPro portable sprinkler base (sold separately A-RP221).