6 Pcs Pre-Filter Sponge Aquarium Foam Sponge Roll Intake Filter Cover For Fish Tank Large

Dimension: Approx. 84cm/3.15 x 1.57inch cylinder the inside hole diameter is 2cm/0.79 inch please note these foam are pre-filter sponges so only have single hole. Prefilter sponge can prolongs the life of your filter media can be used again after cleaning.Made from reticulated low density black sponge flexible Installs in seconds and lasts for months or even a year depending load factor of your filter Effectively dislodges dirt algae and debris from all pool surfaces Preventing small babyor weaker inhabitants from being drawn into the filter.Enhances biological filtration