- NSF CERTIFIED MATERIAL: The Type C filter is constructed from BPA-free PET composite, featuring a high-chlorine-resistant end cap and a durable polypropylene core. This certification ensures a safe and enjoyable experience in your leisure time. - COMPATIBLE MODELS: Designed to fit a variety of filter pump units with an outer diameter of 4 inches and a length of 8 inches. It has 2-inch openings at both the top and bottom. Compatible with models including 28603EG, 28637EG, 28635EG, 28671EG, 58603E, 58604E, 56633E, 56636E, 56637E, 56638E, and 58623. Note: All brand names and part numbers are the property of their respective owners and are referenced for compatibility only. - EXCEPTIONAL FILTRATION PERFORMANCE: The advanced "dirt locking" technology allows this filter to capture significantly more impurities than traditional filters. It effectively removes hair, leaves, dust, sediment, and sand, ensuring a clean and inviting swimming environment for your spa or pool. - WASHABLE AND REUSABLE: Made from easy-to-clean, durable fabric, the Type C filter can be rinsed and reused for extended life. For optimal performance, it is recommended to replace the filter every two weeks. To prevent corrosion, remove the filter before cleaning. - USE SCENARIOS: Ideal for maintaining clean water in residential pools and hot tubs, ensuring a healthy and enjoyable swimming experience for family and friends. Perfect for regular use during pool parties or recreational swimming, enhancing the quality of your water without hassle. Ensure your pool or spa remains in peak condition with this reliable and efficient Type C filter.