Features Convenient Design: The DC 12V dosing peristaltic pump adopt the design without screw clasp, easwitching power supply positive an 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. Easy to Replace: DIY peristaltic tube head dosing pump doesn't have valves and seals, convenient hose replacement , easy maintenance. Self-priming Function: These Small Dosing Pump have the function of Self-priming. Specification: Color: Black, white, green(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 Package List