[Peristaltic liquid pump]: Applicable power supply: DC 12V; working environment: temperature 0-40 ; range: 0-23ml / min 0-65ml / min 0-150ml / min; speed range: 0.1-60 rpm; current: 250 -300mA. [Medium direction]: The direction of the peristaltic pump depends on the positive and negative terminals of the power supply, and the connection terminals can be selected arbitrarily. [Easy to install]: The motor diameter is about 32mm / 1.3in, the height is about 23mm / 0.9in, and the center distance of the mounting hole is 48.5mm / 1 , 9 inch, which is easy to install and remove. [Wide range of applications]: DC peristaltic pump is suitable for experiments, biochemical analysis, fine chemistry, biological engineering, etc. [Optional Style]: The peristaltic pump has three styles for you to choose, optional style (inner diameter x outer diameter): Type A: 1x3mm rubber tube, Type B: 2x4mm rubber tube, C type: 3x5mm rubber tube., Weight: 0.1322773572 Pounds, Manufacturer: Hyuduo