Aquarium tank filter integrated bio-filtration, oxygenation, and physical filtration to help small fish or shrimp to live a happy & healthy life. Key Features: Included: 1x Retractable Outlet Pipe with Air Tube Connection, 1x Double Sponge Filter with Media Container, 1x Ceramic Pearls, 2x Suction Cup, 2x Sponge Replacement (In ceramic pearls container), 1x User Manual Multi-filtration functions: This double-sponge fish tank water filter integrated bio-filtration, oxygenation, and physical filtration in one place. It also makes small water flow which can ensure the excellence of the water quality. More efficient and durable: The hygger fish tank filter with double sponges means more surface area for beneficial bacteria filtering the aquarium water crystal clear. It can also remove the peculiar smell. Super quiet and more delicate bubbles: Hidden outlet design; Lower noise; More delicate bubbles. Sponge Dimension: 2.4"Dx4.9" H Inner Hole Diameter of Sponge: 0.39" Applicable: 15-55 Gal Applicable Air Pump: 4 W AirTube:4 mm (0.16 Inch) Pipe Length: 6.1"~9.25" Capacity: 200ml Weight of ceramic media ball(0.8-1cm): 0.25 lbs Colour: Black Material: Plastic, Soft Sponge Made in: China Dimensions (HxWxD): 15.5x23x5 cm Weight: 0.3 kg Manufacturer's Warranty: 1-year Warranty.