Description: Wall-mounted design is very convenient to use and save space. Safety filter design prevents small fish or impurities from being sucked into the inside. The built-in filter cotton can effectively filter small garbage and purify water quality. And oxygen regulating port can increase oxygen efficiently, eliminating the need for air pumps, which is convenient and effective. Made of hih quality plastic and metal, it's environmentally friendly and durable. Style A length is 4.5cm, width is 3.5cm, height is the 18cm, style B length is 5cm, width is 4.3cm, height can be extended to 20cm. It's very suitable for increasing oxygen, degreasing filtering impurities for aquarium and fish tank. Item Name: Oil Film Processor Material:Plastic, Metal Style: Modern Shape: Rectangle Type: Standard Size: A: 3.5cmx4.5cmx16cm/1.38inx1.77inx6.3in B: 4.3cmx5cmx20cm/1.69inx1.97inx7.87in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Oil Film Processor