Features: brand new and high quality<br> Micro-pump is mainly used for medicines, gas analysis sampling, instrumentation and other fields. Completely maintenance-free, and no oil pump, do not pollute the transmission medium.<br> Micro-pump is powered miniature for DC motor drive, drive internal mechanical eccentric eccentric motion, driven by an eccentric movement inside the diaphragm reciprocates.<br> Small, stable and reliable, hand-held instrument for pump-priming, low noise, low power consumption. Especially -suitable for high negative environmental requirements.<br> Suitable for 4.5-6mm tube. Mainly about the hardness. The largest part of the outer diameter is 6.5mm.<br> 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.<br> Specifications: Material:Plastic + Aluminum<br> Operating voltage: DC9V ~ 14V<br> Rated voltage: for DC 12V<br> Current Rating: 500mA<br> Power Rating: 6W<br> Suction capacity: 5L / min<br> Vacuum degree: 65kpa<br> Maximum pressure: 120kpa<br> Noise: <60db<br> Size:Approx. 8.5x6 for cm/3.34x2.36 inches<br> Package Includes: 1x Vacuum Pump<br> note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order.<br> 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.