Rain Bird 4252NZLPK Nozzle Pack for 42SA+, 52SA, 42SA, 5000 Series Rotors. This is a replacement sprinkler nozzle set for use with Rain Bird 42SA, 42SA+, 52SA, and 5000 series gear drive rotors. Rain Bird nozzle sets are designed to save water with even and efficient coverage. Rotors apply different amounts of water depending on the pattern they are set to water. Assuming the nozzles are the same, a rotor set to water a 90° quarter circle pattern applies more water than a rotor set to water a full 360° pattern. Changing nozzles can help equalize the amount of water being sprayed between rotors set for different patterns and save water. Self-aligning nozzles allow specific adjustments to match your systems individual gallonage and pressure requirements. Easy to remove and replace nozzles with a flat head screwdriver: simply loosen distance adjustment screw until nozzle can be removed; replace with nozzle of your choice and tighten screw until desired distance is achieved. Nozzles fits on these Rain Bird series rotors: 42SA+ Plus, 52SA, 5004PL-PC, 5004PL-FC, 5006PL-PC, 5006PL-FC, 5012PL-PC, and 5012PL-FC. This 12 nozzle set includes: (4) 10° low angle, and (8) 25° angle standard Rain Curtain™ nozzles. Low angle nozzles: 1.0. 1.5, 2.0., 3.0 gallon per minute. Rain Curtain™ model nozzles: 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 gallon per minute. Rain Bird “The Intelligent Use of Water"