Fette filters set replacements Compatible with Winix air purifier C545,compare to part number1712-0096-00 and 2522-0058-00, Winix Filter S. Package Contains: 1 Premium Quality HEPA Filters: compatible with Winix Filters S (#1712-0096-00 and 2522-0058-00) for C545. 4 carbon pre-filters pre cut specifically for Winix C545 air purifiers. This is not a Winix OEM product. The Winix brand name and logo are the registered trademarks of their respective owners. Any use of the Winix brand name or model designation for this product are made solely for purposes of demonstrating compatibility. Packaging may vary, performance does not.