Unicel C-9407-2 Replacement Water Filter Cartridge (2 Pack) - Compatible with Major Filtration Systems for Clean Drinking Water at Home & Office

End Cap Features End cap design includes a 3-inch ID and an open (with older gasket) configuration for easy cartridge removal and replacement; Durable plastic resists damage from chemicals. Optimal Debris Capture Filter pool cartridge has sharp, uniform pleat folds that maximize water flow, minimize pressure loss, and allow full use of the pleat surface to hold more debris. Filter Media Constructed with 100-percent polyester Reemay material that balances dirt-holding capacity, cleanability, and durability with excellent chemical resistance properties.