Replacing large blowers and fans, stainless steel Super Air Knife uses ambient air to amplify small volume of compressed air 40 times. High-velocity, high-volume output cleans, cools, and dries parts, web, or conveyor. Stock lengths range from 3-42 in.; multiple units stack end to end with no dead spots. At 80 psi, knife generates just 69 dBA. Lack of moving parts ensures long life.