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Boyu WM-Series Flow Pump (WaveMaker) Features: Patented impeller structure: slow flow and turbulent flow, which solves the defects of common pump flow mode and flow rate too fast. For you to create marine life - a natural and ecological environment. Swivel angle adjustment, implemented in any suitable direction of water flow, handsome in appearance-power low-flow side large variety of installations allows the user to use;                                                   Model     |    Power  |  Suitable Aquarium     |   Size  
 WM-101        7W                  20-120L              85x78x84mm 
 WM-15          16.5W             80-350L             113x108x110mm 
 WM-1            28W               40-300L             113x108x110mm 
 WM-2           18W                40-260L             113x108x110mm 
 WM-3          4x28W            100-600L           113x108x110mm