Unicel C-8409 90 Square Foot Media Replacement Pool Filter Cartridge with 174 Pleats, Compatible with Hayward Pool Products, Sta-Rite, and WaterwayBrand: Unicel Color: White Features: Replacement Pool Filter: C 8409 filter cartridge features 90 square feet (174 pleats) of 4 ounce basis weight media that catches debris and particles down to an average of 20 microns in size, keeping your water clear 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: