Whole A.B.S made outer shell with light weight, shiny appearance and easy maintenance. Oil-less vacuum pump is the product with combination of technology, life and environmental protection and the necessary item of big hospitals, medium/small clinics, medical nursing & home care. This unit adopts oil-less vacuum pump, high technical design, whole alumium alloy die casting body and various precision elements. High running hardness, wear resistance non-pollution, long life and free maintenance. DF-506D is also the ideal model for gynecology usage.