An energy efficient 320 GPH laminar water pump. The propeller-driven pump creates high water flows with a wide gentle pattern. The water flow can be directed in a range of 160-degree by rotating the directional discharge. Like all Rio water pumps, the unit has a high quality ceramic shaft and ceramic bearing in the impellers rotor for durability and quiet operation. Strong magnet mounts secure the pump to the wall of the aquarium. Dimensions: 2-1/2 by 1-1/2 by 1.9 inche. Magnet will work on glass up to 1/4-inch thick.