Vacuum Pump 220V Oil-Free Silent Laboratory Negative Pressure Electric Air Pump. Negative Pressure Electric Air Pump. 1 x Vacuum Air Pump. This item is in the category “Home & Garden\Tools & Workshop Equipment\Air Tools & Air Compressors\Air Compressors”. The seller is “pumpyy_official_store” and is located in this country: CN. This item can be shipped worldwide.