Finest-Filters 4 x Compatible PolyCarbon Carbon Foam Filter Pads to fit Fluval U3 Range of Internal Filters

• You are buying a pack of 4 compatible polycarbon filter cartridges to fit the Fluval U3 internal filter.
• This is not a Fluval Product. This is a Finest-Filters alternative which serves the same purpose as the original brand.
• These filter cartridges have a polyester side for mechanical filtration, and a carbon impregnated side for chemical filtration of the aquarium water. <br> <br> These filter pads are made to fit the Fluval U3 range of internal filters.
• These filter pads are made to fit the Fluval U3 range of internal filters.

You are buying a pack of 4 compatible polycarbon filter cartridges to fit the Fluval U3 internal filter. These filter cartridges have a polyester side for mechanical filtration, and a carbon impregnated side for chemical filtration of the aquarium water. These filter pads are made to fit the Fluval U3 range of internal filters. This is not a Fluval Product. This is a Finest-Filters alternative which serves the same purpose as the original brand.