The Millenium 5 x 13 R is a compatible replacement for the following pool filter cartridges:
The Millenium Spas Comp. Pool Filter Replacement is a pool water filter constructed with a media area of 50 sq. ft. This compatible Millenium Spa filter cartridge is constructed with Open 2 1/8" top/bottom styles, and measures 4 15/16" (diameter) x 13 5/16" (length). This spa filter replacement improves the quality and clarity of swimming pool/spa water.