Micro- is powered miniature DC motor drive, drive internal mechanical eccentric eccentric motion, driven by an eccentric movement inside the diaphragm reciprocates.Whereby the chamber fixed volume of air compreion (compreion suction port is closed, the exhaust port is formed to open slightly positive preure), stretching (compreed exhaust port is closed, a negative preure sucking mouth open), the ing air intakes with the outside atmospheric preure difference, at a preure difference, the preure (suction) into the chamber, and discharged from the exhaust port.Micro- is mainly used for , ysis sampling, instrumentation and other fields. Completely maintenance-free, and no oil , do not pollute the nsmiion medium.Small, stable and reliable, hand-held instrument for -priming, low noise, low power consumption. Especially -suitable for high negative environmental requirements.type:DC12V Mini Vacuum Operating voltage: DC9V ~ 14VRated voltage: DC 12VCurrent Rating: 500mAPower Rating: 6WSuction capacity: 5L / minVacuum degree: 65kpaMaximum preure: 120kpaNoise: Le than 60dbSuitable for 4.5-6mm tube. Mainly about the hardne. The largest part of the outer diameter is 6.5mm.Colour:silver + blackMaterial:Metal + PlasticPackage Contents:1 x Vacuum suction Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.