2 kinds of rated working voltage are provided for you to choose - 12V and 24V. Features: 304 Stainless Steel Wheel Frame- The wheel frame of the peristaltic pump is made of 304 stainless steel, which is solid and corrosion-resistant, less power consumption, less noise than plastic one. Ball Bearing Design- The wheel frame of the self-priming pump has ball bearing, which is silent, heavy duty and can serve quite a long life. Adjustable Flow Direction- The flow direction of the peristaltic pump depends on the connection way of positive and negative. Easy to Use- Pump cover is no valves and seals, convenient hose replacement, easy maintenance. Wide Range of Applications- The vacuum pump can widely be used in the field of experimental, biochemical analysis, pharmaceuticals, fine chemical, biotechnology, pharmaceutical, water treatment, environmental protection, etc. Specification: Model: G928 Installation Method: L Panel Motor Type: DC Brush Motor Motor Power: 12V,24V(Optional) Pump Head: Roller Peristaltic Pump Pump Shell: Transparent PC Pump Material: Food grade Platinum Vulcanized Silicone Hose Roller Bracket: 304 Stainless Steel Flow Range: 500ml/min Tube(internal dia.*outside dia.): 6.4mm * 9.6mm Product Weight: 287g Package Size: 10 * 6 * 10cm / 3.9 * 2.4 * 3.9in Package Weight: 295g / 10.4oz Package List: 1 x Peristaltic Pump 1 x Wrench