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When you're ready for vacuum bagging, but don't have a vacuum pump, this generator provides a low-cost option. Just attach the Vacuum Generator in-line to a reliable air compressor capable of producing 30–70 psi at 3.5 CFM. It creates a venturi-style vacuum that pulls 2.2 CFM at 27" Hg (mercury)—perfect for producing high-performance composites within a bag.