• Weight: 4 oz. 

• Width: 8.875" 

• Length: 19.5" 

• Area: 90 sq. ft. 

• Top Style: 4" Open 

• Bottom Style: 4" Open 

The Filbur FC-1971 is a replacement swimming pool filter cartridge for the Purex/Pentair DM 90. The FC-1971 pool or spa filters are made of tightly-packed polyester pleats that cover a water filtration surface area of 90 square feet per cartridge. Swimming pool filters promote a clear and safe swimming environment by removing harmful bacteria and other microorganisms during the filtration cycle. The FC-1971 pool filters are able to replace the following manufacturer part numbers: Pentair/Purex R173580, Unicel C-8402, Pleatco PDM90, and Aladdin 19004.