FLT Single Cartridge Filters manufactured by Hayward® Industries are the solution to rusting and corroding metal filters. This product is constructed in all plastic materials which never rust or corrode preserving the nature and quality of the liquids it holds. It comes with a vast range of filter bags. Non-woven polypropylene filter bags can be purchased in 1, 5, 10, 25, 50, 100 and 200 micron sizes. The bag is held by a retaining basket which has a universal seat that is compatible with standard filter bags such as the 7½ x 16½ or 7½ x 32½ filter bag. Hayward Simplex Bag Filter comes with a pre-installed vent or bleed valve on the cover of the polypropylene model as well as an basic mounting flange.