Small dosing pumps have priming function, no valves or seals, convenient tube replacement, and easy maintenance. Negative support: swap the positive and negative power supplies to reverse the pump head. The dosing pump is generally used in the fields of experimentation, biochemical analysis, pharmaceuticals, fine chemistry, and biotechnology. Motor offers efficient performance with stable output, reduced operation noise, and features a snap-on design without screws for convenient disassembly and assembly. Stainless steel screws provide rust and corrosion resistance. The pump head is designed for easy disassembly, cleaning, and maintenance. Type: C Applicable power: Direct current 12V Working environment: 0-40°C Relative humidity: Less than 80% Pump tube (inner x outer diameter): 3 x 5mm Flow range: Type C: 10-26ml/min Speed range: 0.1-60rpm Current: Type C: 250-300mA Motor size: 32 x 23mm / 1.3 x 0.9inch Center distance of installation hole: 48.5mm / 1.9inch Color: Black Material: Plastic + Metal Package Contents: 1 x Peristaltic Pump Note: Light reflection and different displays may cause the color of the item to appear slightly different from the real one. Measurement allows for a tolerance of +/- 1-3cm.