Features: Premium Fish tanks Filter Media Container:Efficiently houses active carbon and other media to improve water purification for a healthy aquarium ecosystem. Plastic construction ensures long time performances for continuous water environment optimization. Ideal for freshwater/saltwater aquarium enthusiasts want professional filtration storage for their fish pet' habitat maintenance. Perfectly fit into sump systems, canister filters, or on back setups to optimize filtration efficiency for home or professional aquariums. Multiple compartment design allows simultaneous separation of different filter media type while maintaining better water flowing through the media bed. Specifications: Component: PVC Size: approx.12x12x11.50cm/4.72x4.72x4.53inch Quantity: 2pcs Package Includes: 2pcs Storage Box (Water Purifying Filter is not included) note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.