Rain Bird Xerigation SXB-180-SPYK: Half Circle, 5 Streams, 5 inch Spike Ideal for shrub plantings, trees, containers, and flower beds Four convenient installation connections available for design flexibility Adjust flow and radius by turning outer cap Clean by completely unscrewing cap from base unit 10-32 self-tapping thread, 1/2 inch FPT, 1/4 inch barb, and 5 inch spike