Large Flow Low Noise Vacuum Pump. Features: Made of High Quality Material, Durable and Long Service Life Large , the Can 10 ~ 20L/min Low Noise, Smooth to Operate with Stable Performance The Connecting Outer Diameter is 7mm, Easy to Install and Remove Available in Three Styles for Choice: DC12V, DC24V, AC220V Specifications: Item Type: Vacuum Pump Rated Voltage(optional): DC12V, DC24V, AC220V Power: 24W Positive Pressure: 350kpa Negative Pressure: -90kpa Size: Approx. 51 X 151 X 84mm / 2 X 5.9 X 3.3in Outer Diameter: Approx. 7mm / 0.3in Certification: CE Structure: Diaphragm Pump Fuel: Electric Power: Pneumatic Pressure: Low Pressure Standard or Nonstandard: Standard Usage: Vacuum Pump Model Number: Pump Type: Micro Pump Product: Vacuum Pump Item Type: Mini Vacuum Pump Condition: High Quality and Brand New Style: Oil Kerosene Pump Suction Package List: 1 X Vacuum Pump 2 X Accessories . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.