"AIR POWER VACCUM,SINGLE STAGE DESIGN,10.750 IN. LG,5 IN. VACCUM,OUTSIDE DIA 1.250 IN.,CYLINDER SHAPE,ALUMINUM ALLOY,INCLUDES EXHAUST MUFFLER,ALUMINUM CORRGATED PAPER,OUTSIDE DIA. 3.250 IN.,MAX VACCUM LEVEL 28 IN. HG,MAX VACCUM FLOW AT 0 IN. HG,MINUS .20 STANDARD CUBIC FT PER MIN.,AIR COMSUMPTION AT 80 PSI 22 SCRM"