• Weight: 3 oz. 

• Width: 4.9375" 

• Length: 14.875" 

• Area: 45 sq. ft. 

• Top Style: 2 1/8" Open 

• Bottom Style: 2 1/8" Open 

The Filbur FC-1617 is a replacement spa or pool filter cartridge for the Sonfarrel 50. The FC-1617 spa filters are polyester-pleated cartridges that feature an open PVC-enforced core measuring 2 1/8 inches in diameter. Spa and swimming pool filters work in conjunction with balanced water chemistry to improve water clarity and health by removing harmful bacteria and other microorganisms. The FC-1617 spa filter cartridges are able to replace the following manufacturer part numbers: Sonfarrel/Martec 220142, Unicel C-4347, Pleatco PTM50, and Aladdin 15003.