The Rainbow has a pattern designed for watering turf, established or seedling flowerbeds, or vegetables without damaging sensitive young plants. I t delivers a focused spray of millions of individual uniform droplets and is also very effective at low to medium pressure. The nozzle can either be fitted directly to a standard garden hose, brass control valve, or watering wand. The Rainbow is made of durable brass & stainless steel components and designed to resist plugging with grass clippings, sand and other debris that often clog conventional hose end nozzles. Rainbow Flow Rates are Pressure (PSI)/Flow Rate (GPM) 10/4.0; 20/6.6; 30/8.9; 40/10.2; 50/11.7; 60/13; 70/14.5; 80/15.0; 90/15.8; 100/16.6.