➤SPECIFICATIONS:Length: 28 3/16"; Outside Diameter: 8 15/16" ; Top & Bottom Opening: 4" ; Filtration Area: 175 sq. ft; Filter Material: Trilobal Filtration Fabric. ➤COMPATIBLE MODELS: PLF175A Pool Filter is compatible with Hayward C1750, C17502, C17502S, PA175, Unicel C-8417, Sta-Rite Posi-Clear PXC175, Waterway Proclean PCCF-175, 25230-0175S, 817-0175P, Aladdin 27501. ★NOTE: This is a compatible replacement. Original manufacturers' names and part numbers are for reference only. POOLPURE stands as an independent brand. ➤NSF/ANSI 50 CERTIFIED: POOLPURE Pool and Spa filter has been rigorously tested and certified by IAPMO against NSF/ANSI 50, ensuring safe material usage. With a precision of 50 microns, our filter effectively removes hair, leaves, dust, sediment, sand, and other fine particles. ➤POWERFUL FILTRATION CAPACITY: Our unique trilobal filtration fabric offers an enhanced surface area, optimizing back pressure throughout your filtration system. This ensures consistently clean, fresh, and clear water for your pool or spa. ➤EASY MAINTENANCE: The uniform and high-performing trilobal fabric ensures effortless stain capture and release, simplifying the cleaning process. For optimal performance, it's recommended to clean the cartridges monthly, depending on usage.