The Rain Bird 15 ft. Half-Circle Pattern Nozzle Fits all Rain Bird sprinklers and shrub adapters. Matched precipitation rates across sets and across patterns in 5 Series, 8 Series, 10 Series, 12 Series, and 15 Series for even water distribution and design flexibility. 1800 Series white filter (.035" x .035") screens (shipped with nozzles) maintain precise radius adjustment and prevent clogging. Stainless steel adjustment screw to adjust flow and radius.