Product Specification: Model (Choose in product option) Option 1) 12V 370 Air Pump Power: 2.4W Air Flow: 3 LPM Rated Voltage: 12V DC Tube Outer Diameter: 4.3mm Option 2) 12V 555 Air Pump Power: 12W Air Flow: 10 LPM Rated Voltage: 12V DC Tube Outer Diameter: 7mm