This unique design provides extremely uniform coverage over a large diameter at low pressures with low evaporative losses. Only one moing part. Constructed entirely of engineering-grade thermoplastics for long-lasting performance. Two year warranty on materials, workmanship and performance. Five year warranty on orifice nozzle wear. Multi-level throw, approximate angle:10 degrees Operation pressures: 15 to 40 psi (1.0 to 3.0 bar) Stream heights range from 1.5 - 3.0 ft above nozzle based on pressure and nozzle size. Diameter of throw 34'-43' depending on pressure and height above crop. Flow rate of 1.30-2.14 GPM based on PSI. Standard inlet: 1/2" NPT male