Packaging weight: 300g Packaging size 11 * 7.7 * 6.7cm Packaging method: Paper box material: Engineering plastic+aluminum DC12V Mini Vacuum Pump specifications Working voltage: DC9V~14V Rated voltage: DC 12V Rated current: 500mA Rated power: 6W Suction force: 5L/min Vacuum degree: 65kpa Maximum pressure: 120kpa Noise:<60db Suitable for 4.5-6mm pipes. Mainly about hardness. The maximum outer diameter is 6.5mm. feature -The micropump is driven by a micro DC motor, which drives the internal mechanical eccentric motion. The eccentric motion drives the internal reciprocating motion of the diaphragm. Thus, the fixed volume of air in the pump chamber is compressed (the compressed suction port is closed, and the exhaust port forms a slightly open positive pressure), stretched (the compressed exhaust port is closed, and the negative pressure suction port is opened), and the extracted air enters the pump chamber under a pressure difference with the external atmospheric pressure. The gas pressure (suction) enters the pump chamber and is discharged from the exhaust port. -Micro vacuum pumps are mainly used in fields such as electrical products, industrial products, vacuum preservation machines, automotive exhaust emission control equipment, medical equipment, gas analysis sampling, instruments and meters. Completely maintenance free, oil pump free, non polluting transmission medium, capable of continuous operation for long periods of time. -Small size, stable and reliable, handheld pump suction instrument, low noise, and low power consumption. Especially suitable for high negative environmental requirements. Packaging list: 1 vacuum suction pump