Features: Small size, easy to install, it can save internal space. It is suitable for 3 sizes (mm) of tube optional - 1*3, 2*4, 3*5. Made of imported high transparent PC and PP materials, POM gear case, nylon+MoS2 gear. Adopts food-grade peristaltic silicone tube, durable and safe. Motor life can up to 800 hours. Driven by a gear box for maximum efficiency, the pump is most suitable for installation inside the machine, free of maintenance. Rotary buckle structure, gently twist to the left, can easily remove the pump head and replace the pump pipe. It can be used in experiment, biochemical analysis, pharmacy, bioengineering, environmental protection, powder, etc. Specification: Rated Voltage: DC 12V, DC 24V (optional) Working Environment: Temperature 0-80 Tube Size (internal dia.*outside dia.): 1*3, 2*4, 3*5 (Unit: mm) Tube Material: Food Grade Transparent silicone pipe Tube Service Life: 200hrs Product Weight: 90g Package Size: 8 x 7.5 x 6cm/3.1 x 2.9 x 2.3in Packing List: 1 x Peristaltic Pump