Only one moving part, which translates to longer life-Low wind drift and evaporative loss at low pressures -Connection: 1/2" M NPT -Two-year warranty on materials, workmanship and performance -Color-coded nozzles for easy size identification. Warranted to maintain correct orifice size for five years -Senninger Wobbler technology ―rotation of grooved deflector coupled with wobbling action― provides the most uniform water application. Wobbler® sprinklers distribute droplets with lower application intensity over a large area of coverage at low pressures.