12" adjustable nozzle. For small shrub or ground cover areas, 12" spacing. This head produces a tight, constant fan of water. Durable cycolac construction and a basket screen to prevent clogging. Stainless steel adjustment screw can reduce watering radius by 25%. Shrub body screws onto riser and is about 2" in height. Sprinkler comes with variable arc 0 to 360 nozzle pre-installed.