Perfect Fit: Type A or C pool filter cartridge replacement for Intext Type A or C, 29000E, 59900E, compatible with intex filter pump models: 28603EG , 28637EG, 28635EG, 28671EG, 56635E, 56636E, 56637E, 56638E, 58603E, 58604E, 58623. Filter Dimensions: Length: 8"; Outside Diameter: 4 1/4"; Top & Bottom Openings: 1 15/16" NSF/ANSI 50 Certified : This filter cartridge is NSF International certified for superior material safety and global pool equipment compliance. Upgraded Tri-Lobe Fabric：Features an advanced tri-lobe non-woven fabric structure that captures 3X more debris with enhanced dirt-holding capacity. Effectively traps hair, leaves, dust, sand, sunscreen residues and other fine contaminants, delivering crystal-clear pool water every time. Long-Lasting Durable Performance：Reinforced end caps prevent cracking and corrosion for long-term use; the sturdy free-flow core and fiber pleats resist deformation, ensuring consistent, reliable filtration and smooth, unobstructed water flow at all times. Easy to Clean & Energy-Saving：Made of premium polyester with well-spaced pleats, debris rinses off effortlessly—saving your time and effort on maintenance. For optimal filtration results, we recommend cleaning or replacing the filter every 2 weeks. Regular maintenance not only extends the filter's lifespan but also protects your pool filter pump from damage and reduces energy consumption.