A full 4-inch pop-up in a tough, commercial-grade plastic case clears tall turfgrass for uniform coverage in square or triangular spacing, and the rolled-over flange keeps turfgrass clear of riser and nozzle. Stainless-steel riser resists damage and vandalism. Special design eliminates blow-by and reduces pressure loss to improve system performance. Dual-direction flushing protects internals from debris and ensures positive pop-up/down, and the heavy-duty spring assures positive retraction. Full circle and adjustable patterns for maximum flexibility. Easy arc adjustment without any tools. Radius can be adjusted up to 25%. Compact cartridge makes repairs quick and easy, and the Quick Lock design permits service from the rotor's top. Nozzle kit offers fully interchangeable nozzles and is included with each rotor.