- RamAir Power Blow Nozzle. The RamAir Power Blow Nozzle has a venturi tip that allows extreme velocity and volumetric flow. Use the RamAir Power Blow Nozzle for air washing register covers and other hard surfaces. The RamAirPower Blow Nozzle has a trigger for variable flow and a hook for a quick hang on your tool belt. Trigger has standard 1/4″ air hose connection. This is a key element for success only RamAir brings to the industry.