Rain Bird 18VAN Variable Arc Adjustable Sprinkler Nozzle w/Screen, 14 to 18 Foot Radius - 25 Pack 18 Foot Variable Arc Nozzle Easy arc adjustment from 0 to 360 degrees A physical left edge indicator makes it easier to feel the fixed left edge. Fits all Rain Bird Type Spray Heads and Shrub Adaptors Stainless steel adjustment screw to adjust flow and radius.