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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