Rainbird 15SST 15' Side Strip Pattern Nozzle Matched precipitation rates across sets and across patterns in 5 series, 8 series, 10 series, 12 series, and 15 series 21 series nozzles meet small-area shrub or turf requirements. 24 series nozzles have a lower water flow which allows more spray heads per zone. 1816 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. Matched precipitation rates across sets and across patterns in 5 series, 8 series, 10 series, 12 series, and 15 series 24 series nozzles have a lower water flow which allows more spray heads per zone. 1816 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.