The CMP 25249 R is a compatible replacement for the following spa filter cartridges:
The Custom Molded Products 25249 Comp. Pool Filter is a pool filter cartridge adept at purifying the water in your swimming pool and spa through 10 sq. ft. of media area. This compatible Custom Molded filter features a 1 15/16" Open top style and 1 9/10" Open bottom style with Slots. The dimensions of this spa filter replacement are 4 1/4" x 4".