Air Multiplier Venturi Nozzle, Increases The Air Flow Of Your Blow Gun, Constructed Of Durable Metal, Designed To Fit Most 6Mm Blow Gun Nozzles, Venturi Nozzle Is Universally Designed To Increase Air Flow & Reduce Energy Cost, Convenient When Needing To Increase CFM Output, Easy To Store In Any Tool Box, OSHA Standards Compliant.