High Efficiency and Low Noise. All-copper movement, compact and convenient. Oil Drain Plug Positioned at Bottom of Oil Reservoir. Oil Sight Glass For Monitoring Oil Levels. Non Slip Cushion Handle. Type: 1L Vacuum Pump. Air inlet thread: 7/16 – 20. Pumping rate: 3.6m ³/ h. 1 x Single-stage rotary vane vacuum pump. There are NO EXCEPTIONS! OR, you may choose to have a replacement. We will reply you ASAP. Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem you have. Our customer-oriented service strives for. Business time: GMT8 (9:00-18:00) from Monday to Friday.