Filter Cotton Sponge Filter Material Aquarium Cotton $ 7.57 Product information: Principle: Pressure filtration Performance: precision filtration Applicable object: water Applicable object nature: weak corrosive Filter material type: non-woven fabric Scope of application: chemical industry Effective filtration area: other (m2) Dimensions: Other (mm) Specifications: dense hole 50x50x2cm, dense hole 50x50x3cm, dense hole 50x50x5cm, middle hole 50x50x2cm,