Hunter Sprinkler PSU0415A PS Ultra Series 4-Inch Pop-Up Sprinkler with 15-Feet Adjustable Nozzle Additionally, the 2" and 4" models are retro-compatible with existing PS Spray bodies, which allow for a quick and easy upgrade Standard PS Ultra models include a pre-installed Pro Adjustable nozzle A Flush Plug version is available without a nozzle or filter screen