Function: 1. The high vacuum efficiency makes such a mini vacuum pump work with low noise. 2. The silent pump is handy, light and portable, easy to install, and has a service life of more than 5000 hours. 3. Built to strict quality control standards, the discharge port is small but has a flow rate of up to 40L / min. 4. Thanks to the precise craftsman of many experts, such a vacuum pump has the right to high performance according to strict rules. 5. No additional step is required when you need to use this pump and the operation is simple. Specification: Item Type: Vacuum Pump Type: siphon pump Model: VN-C4 (brushless) Material : engineering plastic Vacuum: -85 kPa Driving mode: electric Efficiency: mute Application: pipeline pump Transmission medium: air Power: 42 W. Outlet Diameter: Approx. 8.5 mm / 0.3 inch Pump shaft position: horizontal Flow: 40 l / min Weight: approx. 579 g / 20.4 oz Rated Voltage: 12V Pattern: VN-C4 / 12V (brushless) Package list: 1 x vacuum pump There is no more than 8 hours of continuous operation, which must be equipped with an air pipe with an outer diameter of 10 mm.