Controlled OIL-LESS VACUUM PUMP: Twin Piston 3/4 HP 5.5 CFM Good for Milker Machine Pulsator Hookup, Medical/Dental offices, Laboratory and Workshop Applications Like vacuum bagging/packing etc. Come with a vacuum gauge and regulator kit for vacuum lavel control, great addition for milking machine hookup. $ave the oil, no oil-mist problem, Controlled Twin Piston Oil-less Vacuum Pump 5.5 CFM for Cow/Goat Milker Machine Pulsator Hookup