Protek's Constant Gallonage Monitor Nozzles are combination pattern, master stream nozzles with a fixed constant flow. The flow rate is factory preset to customers' specifications. Nozzles have built-in stream shaper designed for maximum reach (Style 825 and 825-BC). Nozzles are adjustable from straight stream to a dense fog pattern. All nozzles are compatible with Protek's wide range of monitors.