It has been widely used in the fields of experiment, biochemical analysis, pharmacy, fine chemical industry, bioengineering, pharmaceutical filling, food, paper industry, ceramics, water treatment, environmental protections and so on.Features:Small dosing pumps have self-priming function, no valves or seals, convenient tube replacement, easy maintenance.Positive and negative support: swap the positive and negative power supplies, can reverse the pump-head.The dosing pump is generally used in the fields of experimentation, biochemical analysis, pharmaceuticals, fine chemistry, biotechnology.Motor efficient with a stable performance in output, reduced operation noise, used the clasp without screw for convenient disassembly and assembly.Stainless steel screws, rust corrosion resistance.The pump-head designed for easy disassembly, easy to wash and maintain.Specification:Type: A, B, C (optional)Material: metalApplicable power: direct current 12 voltageWorking environment: 0-40Relative humidity: Pump tube(innerxouter diameter): 3 x 5mmFlow-range:type A: 60-150ml or mintype B: 25-70ml or mintype C: 10-26ml or minSpeed range: 0.1-60rpmCurrent:type A: 300-350mAtype B and type C: 250-300mAMotor size: 32 x 23mm or 1.3 x 0.9inCenter distance of installation hole: 4 8.5mm or 1.9inPackage size: 65 x 55 x 50mm or 2.6 x 2.2 x 2.0inPackage weight: 80g or 2.8ouncePacking List:1 x Peristaltic Pump