Features: Adopt the design without screw clasp, easy to disassemble and maintain Support CW and CCW: switching power supply positive and negative pole, realize the CW and CCW of the pump head Flow direction: you can control the flow direction by the positive and negative connect. No valves and seals, convenient hose replacement , easy maintenance These Small Dosing Pump have the function of Self-priming Widely used in the field of experimental, biochemical analysis, pharmaceuticals, fine chemicals, biotechnology Specification: Color: Black, white, blue(Optional) Flow range: 10ml/min -90ml/min Dc motor: 12V Silicone tube: 2 * 4 Flow rate:> 39ml/min Material of pump head: ABS Pump tube: transparent silica gel tube Pulsation: three rollers with small pulsation Weight: 82 g / 2.9 oz(approx.) Package list: 1 x Peristaltic Pump 1Adopt the design without screw clasp, easy to disassemble and maintain 2Support CW and CCW: switching power supply positive and negative pole, realize the CW and CCW of the pump head 3Flow direction: you can control the flow direction by the positive and negative connect. 4No valves and seals, convenient hose replacement , easy maintenance 5These Small Dosing Pump have the function of Self-priming