... oils,lubricants,liquids,solutions,insecticides,herbicides,etc.Cooling:Gases,smokes,heat exchangers,tanks,steels,roofs,etc.Water screen:Fire protection ... ,heat protection,dust suppression,etc.Metal makeCeramic orifice insertedStructure3-piece ... /680750VV173485/680750VV173485/680750 3-piece Structure Vee jet nozzle (tungsten carbide orifice inserted)