Features:Pump head adopts buckle design without screw, which can be removed through pressing the buckles on both sides with your hands, easy to clean 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. This small dosing pump has the function of self-priming.Widely used in the field of experiment, medical, biochemical analysis, pharmaceuticals, fine chemicals, biotechnology, food, environmental protection, family, etc.Specifications:Model: G328Color: Black/Green(optional)Silica Gel Tube(internal dia.*outside dia.): 1mm*3mm/2mm*4mm/3mm*5mm(optional)Motors: DC12VFlow Rate:1*3 silica gel tube: >11ml/min2*4 silica gel tube: >39ml/min3*5 silica gel tube: >80ml/minPump Head Material: ABSPump Pipe: Transparent silicone pipePulsations: Three rollerPackage Size: 7.0 * 6.0 * 4.5cm / 2.8 * 2.4 * 1.8inPackage Weight: 84g / 3.0ozPackage List:1 * Peristaltic Pump