Small dosing pumps feature a priming function, no valves or seals, convenient tube replacement, and easy maintenance. Supports positive and negative operation: swapping the positive and negative supplies allows reversal of the pump head. The dosing pump is commonly used in experimentation, biochemical analysis, pharmaceuticals, fine chemistry, and biotechnology applications. Equipped with an efficient motor for stable output performance and reduced operating noise. Features a screwless clasp design for convenient disassembly and assembly. Includes stainless steel screws for rust and corrosion resistance. Pump head is designed for easy disassembly, cleaning, and maintenance. Type: B Applicable: 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 B: 25–70ml/min Speed range: 0.1–60rpm Current: Type B: 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 Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item to appear slightly different from the actual product. Measurement allows an error of +/- 1–3cm.