erfect Compatibility with many Systems?Seamlessly replaces Hayward Star Clear Plus C1750, CX1750RE filter systems. Precision-molded end caps and 4" open core interfaces ensure leak-free sealing and direct hydraulic alignment for optimal flow performance across standard housing chambers. ?Enhanced Filtration with 5oz Heavy-Duty Fabric?Constructed from 5oz trilobal-bonded spun polyester, the filter media features high fiber density and multidirectional surface structure, designed to capture suspended solids as small as 10 microns while maintaining low flow resistance and extended dirt-holding capacity. ?Universal Replacement for Popular Filter Models?Compatible with leading models including Hayward C1750, C17502, C17502S, PA175, Unicel C-8417, Sta-Rite Posi-Clear PXC175, Waterway Proclean PCCF-175, 25230-0175S, 817-0175P, Aladdin 27501, and others. Dimensional tolerances are engineered to 0.1", ensuring cross-brand interchangeability in standard residential and commercial pool systems. ?Precise Dimensions Optimized Filtration Area?Each cartridge delivers 175 sq. ft. of effective filtration surface area, structured through uniformly spaced pleat geometry. The filter core measures: 28-3/16" in axial length 8-15/16" outer diameter, with dual 4" open ends to support laminar flow and prevent backpressure fluctuations. ?Eco-Friendly, Durable Reusable Design?Built with reinforced spunbond polyester media thermally bonded to a high-strength polymer core, the filter resists deformation under continuous pressure cycles. Fully washable and reusable, offering up to 24-36 months of service life under typical residential or seasonal commercial use conditions.