Feature: 1. Suitable for small fish tanks, such as spherical fish tanks, small fish tanks, special‑shaped fish tanks and other small family fish tanks. 2. Ultra‑quiet sponge filter, does not absorb fish or shrimp, suitable for family fish farming. 3. Funnel air outlet, air stone filter and biochemical filter sponge， Can be filtered quickly. 4. With strong suction, it can be installed anywhere on the glass of the fish tank. 5. Small size, large function, can effectively carry out biochemical filtration, Improve filtering effect. Specification: Item Type: Sponge FilterMaterial: PlasticSize: Filter: Approx. 10x3cm / 3.9x1.2in Trachea length: Approx. 105cm / 41.3in (Manual Measurement Error 0.5-2cm). Package List: 1 x Trachea1 x Filter Note: This filter must be connected to an air pump (this product does not include an air pump), Clean the filter cotton regularly, and it is recommended to replace it every 5‑6 months.