Specifications: Micro-pump is powered miniature DC motor drive, drive internal mechanical eccentric motion, driven by an eccentric movement inside the diaphragm reciprocates. Whereby the pump chamber fixed volume of air compression (compression suction port is closed, the exhaust port is formed to open slightly positive pressure), stretching (compressed exhaust port is closed, a negative pressure sucking mouth open), the pumping air intakes with the outside atmospheric pressure difference, at a pressure difference, the gas pressure (suction) into the pump chamber, and discharged from the exhaust port. Micro-pump is mainly used for gas analysis sampling, instrumentation and other fields. Completely maintenance-free, and no oil pump, do not pollute the transmission medium. Small, stable and reliable, hand-held instrument for pump-priming, low noise, low power consumption. Especially suitable for high negative environmental requirements. Item Name: Mini Vacuum Pump Operating Voltage: DC9V - 14V Rated Voltage: DC 12V Current Rating: 500mA Power Rating: 6W Suction Capacity: 5L/min Vacuum Degree: 65kpa Maximum Pressure: 120kpa Noise: < 60db Suitable for: 4.5-6mm Tube (The largest part of the outer diameter is 6.5mm) Size: 8.3cm x 6cm x 3.5cm/3.26" x 2.36" x 1.37" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Mini Vacuum Pump