6 Pack 2.75 Inch 225 Micron Filter Sock Fits Waterbox Aquarium Models, Fits Eshopps Aquarium Models, Fits Fiji Cube Aquariums, Also Fits all 2.75" Filter Sock HoldersBrand: Aolleteau Features: Compatibility: Fits Waterbox Aquarium Models AIO 10 CUBE, AIO 15 PENINSULA, AIO 20 CUBE, AIO 25 PENINSULA, AIO 35. 2, AIO 50. 3, AIO 65. 4, Fits HelloReef 15 Gallon Aquarium, Fits Eshopps Aquarium Models, and Fits Fiji Cube Aquariums & Baffle Kits, Also Fits all 2. 75" Filter Sock Holders Filter socks act as mechanical filters, Eco friendly design allows for socks to be cleaned and reused Easy to Replace: This filter sock