• Weight: 3 oz. 

• Width: 4.9375" 

• Length: 14.875" 

• Area: 50 sq. ft. 

• Top Style: 2 1/8" Open 

• Bottom Style: 2 1/8" Open 

The Filbur FC-1630M is a replacement spa or pool filter cartridge for the Martec 50 Microban. The FC-1630M spa filters are part of the Filbur Freedom Antimicrobial line. The line features Microban technology that prevents the growth of dangerous bacteria on the cartridge to create a healthier and safer pool and spa environment. Spa and swimming pool filters work in conjunction with proper water chemistry to remove harmful bacteria and other microorganisms. The FC-1630M spa filter cartridges are able to replace the following manufacturer part numbers: Unicel C-4305RA.