Description: 【8 Layers Of Filter Pad】: 8D solid pad, high efficiency filtration. 8D is 2 layers mesh pad & honeycomb cotton & activated carbon pad & biochemical cotton & nano biochemical cotton & fiber biochemical cotton& blanket filter contton 【Honeycomb Shape Design】: The filter pad adopts a honeycomb shape design, which has strong water permeability and active carbon absorbs impurities. 【Function】: with 8D filter element, it can easily traps different particles and floating debris, to avoid blockages and provide the largest adhesion area for 【Durable】: The pond filter media is made of strong mesh cloth. Due to its dense structure, it will not be easily deformed no matter how many times it is washed 【Cut To Fit】: Can be cut any sizes as your needed. Very suitable for using in freshwater and marine water Size Chart: (L*W)25cmx11cm/9.84inchx4.33inch Thickness: 2cm/0.79inch Package Includes: 1 Fish Tank Filter Sponge(3 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.