The Unicel C-9421 R is a compatible replacement for the following pool water filters:
The Unicel C-9421 Comp. Pool Filter Cartridge is a pool filter cartridge measuring 10 1/16" in diameter x 28" in length with 5 15/16" top/bottom holes. This pool filter purifies swimming pool and spa water through contaminant reduction. This compatible Unicel filter replacement is manufactured with 200 sq. ft. of media area and 4 ounces of media weight.