• Length: 18”

• Compatible replacement for Unicel FG-3911

The Filbur FC-9870 - DE Grid Swimming Pool Filter Cartridge Replacement will endure a lot of stress and will ensure that the water in your pool stays clean for as long as possible. All the pool filters and spa filters made by Filbur are of extremely high quality when it comes to their endurance. There are not many glued joints on them and their entire frame has been reinforced. Furthermore this swimming pool filter’s seams are sonic welded, which will add a lot to the product’s durability. Also, the 100% Polypropylene cloth makes sure that the proper DE amount that gets into the water pool. Also, it will ensure that no dirt gets past the filtering system and that your water stays as healthy as possible.