The Rain Bird 8 - 15 ft. Shrub Nozzle - Adjustable Pattern mounts above ground on male 1/2 in. fixed risers high enough to clear tall plantings. They are ideal for watering shrubs and flowerbeds. Adjustment screw regulates distance of throw for spacing from 8 to 15 feet apart. Matched Flow Rate nozzle assures uniform watering when different patterns are mixed on the same zone. Distributes water evenly and is compatible with other Rain Bird match flow rate nozzles.