UHD-SR100 pool filter features 100 square feet (195 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. Filter pool cartridge has sharp, uniform pleat folds that maximize water flow and debris capture and minimize pressure loss; Pleat bands help maintain spacing, reduce flutter, and ensure optimal efficiency. Constructed with 100-percent polyester Reemay material that balances dirt-holding capacity, cleanability, and durability with excellent chemical resistance properties. End cap design includes a blue top, orange bottom, 4-3/16-inch ID, and an open configuration for easy cartridge removal and replacement; Bottom includes 12 concentric slots. (G1-85)