Check the listing for details. Peristaltic Pump DC 12V/24V Dosing Pump For Vacuum Aquarium Lab Analytical. Condition: New. Listed at 40.23 USD. Specification: Brand new Motor: 12V/24V DC motor DC motor current: 0.5-1.4A Working environment: 0-40, relative humidity, 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 Shell material: PC Rolling wheel: POM Roller type: ball bearing 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 Features: 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 Package included: 1 x Large flow peristaltic pump 1 x wrench This pump is with a section of tube inside the pump head For extra sapre tube,pls check this link