DELTA FIRE ATTACK 500 is a high performance nozzle for low pressure, with adjustable water flow and jet width. Operating pressure 5 to 8 bar, but already full potential from 3.5 bar. The Delta Attack 500 Select Flow fire nozzles share many of the same features as the smaller Attack 100 and are designed for general fire fighting but also provide excellent performance when dealing with fires in High Rise buildings. The Attack 500 fire nozzles will provide a powerful, long range main jet combined with a coherent stream pattern and high performance water spray pattern.Attack 500 Select Flow Fire Nozzles Computer designed stainless steel spinning turbine teeth produce an extremely dense fog pattern providing excellent fire fighting capability and enhanced personal protection for the firefighter.