Underhill SI100F 1-Inch Full Circle Brass Impact Sprinkler, 71-Foot Coverage Radius Solid brass body; Ultra-reliable high performance sprinkler Stainless steel drive springs Chemical-resistant bearing seals; Bearing assembly hood for longer wear life Use with portable RollerPro sprinkler base (sold separately, item A-RP221) 23 gallons-per-minute (GPM) and 71-foot coverage radius