The peristaltic pump has a three roller structure, with the lower half of the three rollers being gears. The (large) gears on the three rollers and the small gears on the motor shaft form a reduction ratio, which is a relatively new design. The characteristic of a peristaltic pump is its small flow rate but strong delivery pressure. When the voltage is DC12V, its outlet pressure is even stronger. However, a peristaltic pump cannot be as quiet as a diaphragm pump when pumping water, as it may experience shaking. Therefore, it is recommended to fix the pump before use.1.Model: Micro 500 Geared Motor Peristaltic Pump2.Tube size: 2.5mm*4.5mm3.Suitable voltage: DC 6V-12V4.Test data:Voltage:6V Working current:0.5AVoltage:12V Working current:0.6ASize:As the pictures showPackage Included:1PcNote:Due to manual measurement, please allow an error of 1-3mm.As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.