These Adjustable Fog Nozzles are superb for wildland firefighting, fire department use, and industrial use. Just twist to adjust from straight stream to fog. Nozzles are made of hard-coated aluminum with brass and stainless steel. There's even a heavy-duty rubber bumper for added protection. Adjustable Fog Nozzle, 20-60 GPM, 1-½" N.S.T.