Max-Series Nozzle. Automatic pressure control with a flow capacity of 100-500 GPM. The nozzle operates at a standard 100 PSI. The built-in halo ring adjusts the pattern from straight stream to a 120 degree wide fog. Further rotation opens the nozzle to flush 3/8" debris without shutting down. Hard anodized aluminum with rubber bumper. Standard inlet is 2.5" NH.