Features: brand new and high quality Made of eco-friendly sponge and high-quality plastics, safe to all fish. Good filtering effect, adsorbs harmful substances and increase oxygen. Adopt biochemical filtration, more effectively to filter impurities in the water and stabilize the water quality of the fish tanks. Come with bioball, and two suction cups, powerful suction to prevent falling off. Suitable for freshwater & saltwater water tanks and all kinds of ornamental fish breeding, especially for colorful fairy, small fish, shrimp tanks, betta tanks etc. You can take the sponge down from the filter easily to clean or replace it. Package Includes: 1 Set Aquarium Biochemical Sponge Filter (4 Style to Choose) Specifications: Material: Plastics, Sponge Color: Black Style: YU118/YU119/YU118A/YU119A Size: YU118-Sponge Diameter 50mm/1.97in, Sponge Height 80mm/3.15in, Bioball Box Height 40mm/1.57in, Extendable Tube Length 180-250mm/7.09-9.84in YU119-Sponge Diameter 60mm/2.36in, Sponge Height 130mm/5.12in, Bioball Box Height 40mm/1.57in, Extendable Tube Length 270-420mm/10.63-16.53in YU118A-Sponge Diameter 50mm/1.97in, Sponge Height 80mm/3.15in, Bioball Box Height 40mm/1.57in, Extendable Tube Length 220-300mm/8.66-11.81in YU119A-Sponge Diameter 60mm/2.36in, Sponge Height 130mm/5.12in, Bioball Box Height 40mm/1.57in, Extendable Tube Length 270-420mm/10.63-16.53in Weight (Approx.): YU118-155g YU119-209g YU118A-258g YU119A-369g note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to difference between different monitors, the picture may not reflect the actual color of the item. Thank you!