Trusted for decades, Rain Bird MPR Nozzles are installed by more contractors than all other brands combined. MPR Nozzles simplify the design process by allowing sprinklers with various arcs and radii to be mixed on the same circuit while maintaining even water distribution rates. They fit all Rain Bird spray heads and shrub adapters. Sort Quicker, Install Faster, Check Easier. Rain Bird MPR Spray nozzles are color-coded on the top to enhance your productivity. Quickly identify radius and arc with Top Color-coded nozzles. Top Color-coding makes it easy to verify proper nozzle installation, even when system is not operating. Now it's easier to sort, easier to organize and easier to install with Top Color-coded nozzles.