Rainbird 8005-SS 1" Adjustable Sprinkler Rotor - Stainless Steel Riser Full and part circle operation in one unit to reduce inventory requirements Stainless steel riser model helps deter vandalism on public turf areas Easy, wet, dry arc adjustment with slotted screwdriver through top of rotor Water-lubricated gear drive Self-adjusting turbine stator allows nozzle replacement with no other adjustments required