Features:Adopt the design without screw clasp, easy to disassemble and maintainSupport CW and CCW: switching power supply positive and negative pole, realize the CW and CCW of the pump headFlow direction: you can control the flow direction by the positive and negative connect.No valves and seals, convenient hose replacement , easy maintenanceThese Small Dosing Pump have the function of Self-primingWidely used in the field of experimental, biochemical analysis, pharmaceuticals, fine chemicals, biotechnologySpecification:Color: Black, white, blue, green(Optional)Motors: DC12V, DC24V(Optional)Type(Optional): black 12v 1*3, white12v 1*3, blue12v 1*3, green 12v 1*3, black 12v 2*4, white12v 2*4, blue12v 2*4, green 12v 2*4, black 12v 3*5, white12v 3*5, blue12v 3*5, green 12v 3*5, black 24v 1*3, white 24v 1*3, blue 24v 1*3, green 24v 1*3, black 24v 2*4, white 24v 2*4blue 24v 2*4, green 24v 2*4, black 24v 3*5, white 24v 3*5, blue 24v 3*5, green 24v 3*512 v motor Flow rate:1*3 silica gel tube: >11ml/min2*4 silica gel tube: >39ml/min3*5 silica gel tube: > 80ml/min 24 v motor Flow rate:1*3 silica gel tube: >11ml/min2*4 silica gel tube: >40ml/min3*5 silica gel tube: >83ml/minPump head material: ABSPump pipe: transparent silicone pipePulsations: Three rollerHeight: 6.3cm/2.5inWeight: Approx.81g~83g/2.9oz~2.9ozPackage list:1 x Peristaltic Pump