Features: Voltage: DC12/24V Correction rollers take adjustment action to facilitate the user to replace the tube avoid clipping and breaking the tube due to lack of experience Ball bearings in the wheel frame, silent, long life time Stainless steel screws, rust corrosion resistance Set the card slot to prevent deviation correction, pump damage Motor: DC motor DC motor current: 0.5-1.4A Working environment: 0-40, relative humidity: less than 80% Medium flow: the flow direction of this pump depends on the positive and negative connections Flow range: 0 - 500ml/min Tube: inner diameter * outer diameter (6.4mm * 9.6mm) wall thickness: 1.6mm, the maximum diameter: 9.6mm Tube material: transparent silicone tube Roller type: ball bearing Product characteristic: Pump cover: hand twist screws, quick disassemble convenient tube replacement Can be equipped with constant speed DC deceleration motor, stepper motor (adjustable speed)and synchronous motor, long motor life and low noise stepper motor Shell material: PC Rolling wheel: POM Package Included: 1 x High Flow Peristaltic Pump 1 x Hex Key Note: Please allow 1-3cm measuring deviation due to manual measurement.