• Length: 18”

• Compatible replacement for Unicel FG-3913

The DE Filbur FC-9880 - DE Grid Pool Filter Cartridge has a diameter of 13.1875”, a length of 18” and can replace the Unicel FG-3913 part without problem. All swimming pool filters and spa filters made by Filbur are governed by two very important laws of quality: efficiency and resistance. The FC-9880 makes no exception. The seams of this filter are sonic welded and there will be very few glued joints on it. Furthermore, the frame and structure has been reinforced, which makes this spa filter even stronger when it comes to things such as fraying. Also, the cloth quality is at its highest. The 100% Polypropylene cloth of this pool filter ensures that dirt is kept away for as long as possible and that DE gets into the water in a controlled way.