Rain Bird A17F matched precipitation rate shrub spray nozzle, 360 full circle pattern, with adjustable 6' to 15' spray distance. From the Manufacturer: Rain Bird nozzle with 360 full circle pattern. 1/2" female pipe connection mounts above ground on a 1/2" riser tall enough to clear shrubs and tall plantings. "Captured" screw slot prevents screwdriver slippage during adjustment. Stainless steel adjustment screw adjusts flow rate and spray distance from 6' to 15'. Blue fine mesh filter screen protects from clogging and maintains precise radius adjustment. Trusted for decades, Rain Bird MPR Nozzles feature Matched Precipitation Rate watering distribution technology. Nozzles with varying arcs and radii can be mixed on the same zone regardless of spray adjustment and still maintain even water distribution rates. Rain Bird The Intelligent Use of Water"