Dimension: Approx.33*60mm/1.3 (D) x 2.36 (L) inch cylinder, the inside hole diameter is 1.0cm/0.39 inch,please note these foam are pre-filter sponges,so only have single hole.
Enhance biological filtration: These pre-filter sponges could help to trap particles and debris,and prolong the life of your filter media,provide efficient water flow with less clogging for long lasting filtration.
A must have accessories for fish tank filter: Premium pre-filter foam sponges can be quickly and easily attached to the fish tank intake tube stem, preventing small inhabitants from being drawn into the filter.
Good for your fish habitat: Give your fish pet a security habitat! These cylinder pre-filter sponge suit for all shrimp tank owners and anyone else who has baby or small fish in their tank,provide them a good environment.
High quality material: These sponges are made from the top-quality filtration foam, BPA free,good for freshwater and saltwater environments.
