Red Sea 100 Micron Felt Fine Filter Sock

Red Sea Micron Felt & Thin Mesh aquarium filter bags are used for mechanical filtration. For use in sump filters, 3 different bags are available to suit individual set ups. Reusable many times over, they are 26cm long and 10cm in diameter, fitting Red Sea?s REEFER and MAX-S aquariums along with other standard 4? filter bag holders.