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