Features: This small dosing pump has the function of self-priming. Planetary reduction gear transmission, flow rate stability, long service life. No valves and seals, convenient hose replacement, easy maintenance. Flow Direction: You can control the flow direction by the positive and negative connect. Widely used in chemical, experiment, food, plants, environmental protection, family and many other fields. Specifications: Model: G528 Silica Gel Tube(internal dia.*outside dia.): 1mm*3mm/2mm*4mm/3mm*5mm(optional) Motor: DC 6V Current: 250-300mA Working Condition: 0-40 Relative Humidity: 80% Flow Rate: 1*3 silica gel tube: 23ml/min 2*4 silica gel tube: 65ml/min 3*5 silica gel tube: 150ml/min Rotate Speed: 0.1-60 rpm Motor Size(*H): Approx.32*23mm Installation Hole Distance: Approx.48.5mm Package Size: 6.0 * 6.0 * 5.0cm / 2.4 * 2.4 * 2.0in Package Weight: 69g / 2.4oz Package List: 1 * Dosing pump