The OnCore Filtration WPOC.PNAJ16AM is a Replacement Filter for a Pentair 75 SqFt Clean & Clear Filter. Long-lasting Clean & Clear Cartridge Filter with fiberglass-reinforced, chemical resistant, polypropylene tanks. Optimal cycling of the water to trap unwanted debris for a more ideal pool experience. The coreless cartridge can be rinsed clean in minutes with a garden hose. Pool pros love the spin-on unions that provide less effort install.