• Weight: 4 oz. 

• Width: 7.25" 

• Length: 14.25" 

• Area: 65 sq. ft. 

• Top Style: 3" Open with Step 

• Bottom Style: 3" Open 

The Filbur FC-1636 is a replacement spa or pool filter cartridge for the Sonfarrel 65 with step. The FC-1636 spa filters are polyester-pleated cartridges that cover a surface area of 65 square feet. Spa and swimming pool filters promote a safe swimming environment by removing debris and harmful bacteria and other microorganisms. The FC-1636 spa filter cartridges are able to replace the following manufacturer part numbers: Sonfarrel/Martec 2301650, Unicel C-7415, and Aladdin 16504.