Orbit 4" Spring Loaded Pop Up Underground Sprinkler with 15' Half Pattern Nozzle. This medium area sprinkler head features a standard plastic cap and long lasting, durable construction. It has a flow adjustment screw for easy flow and radius adjustment, a drop-in filter to prevent nozzle plugging, a stainless steel retraction spring, and a wiper seal to keep out sand and grit. 4" pop up height. 1/2" male threaded. For outdoor use with cold water only.