Description: OOTDTY -Micro-pump is powered miniature for DC motor inside mechanical eccentric motion, pushed via an eccentric motion inside the diaphragm reciprocates. -Whereby the chamber constant volume of air compression (compression suction port is closed, the exhaust port is shaped to open barely positive pressure), stretching (compressed exhaust port is closed, a destructive strain sucking mouth open), the pumping air intakes with the outside atmospheric strain difference, at a stress difference, the gas stress (suction) into the chamber, and discharged from the exhaust port. -Micro-pump is especially used for medicine, fuel evaluation instrumentation and different fields. -Completely maintenance-free, and no oil do not pollute the transmission -Small, secure and reliable, hand-held device for pump-priming, low noise, low energy consumption. Especially right for prime negative environmental requirements. Specification: Brand new Type: DC12V Mini Vacuum Operating Rated Positive pressure: 8000mmHG Negative pressure:-500mmHG Rated Current: 350mA Rated Power: 20W Suction capacity: 8L / min Inlet diameter:6mm Outlet diameter: 6mm Vacuum degree: 66kpa Maximum pressure: 120kpa Noise:<60db Size: as picture displays Color: as photograph exhibits Package include: 1 Micro Vacuum