Single Replacement Filter , FC-0196M, 5CH-502RA, PPM50SC-F2M-M, AntiMicrobial microban cal spa 50 sq ft. Replaces Unicel 5CH-502RA, Filbur FC-0196M, Pleatco PPM50SC-F2M-M Diameter: 5-1/4", Length: 12-3/16", Top: Handle, Bottom: 2" MPT Threaded Filter Area: 50 sq. ft. 3 oz. Reemay Filtration Fabric infused with Microban antimicrobial product protection Cal Spas | Everyday Hot Tubs | Fox Wal-Pak | Hide Away Hot Tubs | Marquis | Pacific Marquis