Features: _x000D_ 100% brand new and high quality. _x000D_ Flow direction of peristaltic pump depends on the mode of connection of positive and negative terminal which you can choose randomly. _x000D_ It has been widely used in the fields of experiment, biochemical analysis, pharmacy, fine chemical industry, biological engineering, food, paper industry, etc. _x000D_ It is small and has the advantage of low noise and no pollution. _x000D_ It has high accuracy and it is convenient to change pump pipe. _x000D_ _x000D_ _x000D_ Specification: _x000D_ Condition: 100% Brand New _x000D_ Applicable Power Supply: DC 6V _x000D_ Working Environment: 0-40 _x000D_ Pump Pipe(inner*outer diameter): _x000D_ #1 Approx. 1*3mm _x000D_ #2 Approx. 2 * 4mm / 0.1 * 0.2in _x000D_ #3 Approx. 3 * 5mm / 0.1 * 0.2in(Optional) _x000D_ Flow Range: 0-23ml/min, 0-65ml/min, 0-150ml/min _x000D_ Speed Range: 0.1-60rpm _x000D_ Current: 250-300 ma _x000D_ Motor Size: Approx. 32 * 23mm / 1.3 * 0.9in(diameter* height) _x000D_ Center Distance of Installation Hole : Approx. 48.5mm / 1.9in _x000D_ _x000D_ Package List: _x000D_ 1*Peristaltic Pump