Series of high-efficiency, multi-stage air powered venturi vacuum pumps deliver 27 in. Hg from 45-psi source. Pumps are compact and lightweight, with no moving parts, and offer reliable 100% duty cycle. Five sizes offer 4 to 20 scfm vacuum flow from 1 to 7 scfm air consumption. Measures 3.78 1.26 98 in. with 2.76 2.76 in. muffler. Offered with G to NPT adapters.