Compatible with for Aqua- EZ-Change # 2 Aquarium Filter, fit for 10-20 power filters [Full Filtration] The filter elements uses dense filter cotton, which can absorb debris and fish excretion. The mesh design of the fish tank filter elements allows the activated carbon and water to fully contact to achieve water purification, thus providing a and comfortable living environment for your lovely pets. , while saving you the time of manually cleaning the fish tank. [Ready to Use]Our filter elements is already set up, just install it correctly on the power filter for fast filtration. If there is carbon on the filter cotton, please clean it before use. [Easy to Replace]: No tools are required to replace the old fish tank filter elements. After many tests by our engineers, we found that the adsorption of activated carbon is limited, and it is recommended to replace it within 2-4 weeks to maintain the best effect. size: about 11.9 x 15.5 x 1.2cm Material: Activated carbon+PP colour: blue Package Contents: 10 x filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.