Miniature vacuum pump is made of material, it uses high-performance oil-less lubrication material and wear-resisting thin-wall cylinder sleeve. Micro-pump is powered by miniature DC motor drive, drive internal mechanical eccentric motion, driven by an eccentric movement inside the diaphragm reciprocates. Pump is widely used in household medical oxygen generators, dental medical laboratory equipment, disinfection equipment, vacuum packing machines, and many other industries. Low noise, low power consumption. oilless vacuum pump is especially suitable for high negative environmental requirements. You are welcome to contact if you have any problem about our product, we will give you a satisfactory reply., Manufacturer: LPUHHDA