• Weight: 4 oz. 

• Width: 6" 

• Length: 9 3/4" 

• Area: 25 sq. ft. 

• Top Style: Crescent Handle 

• Bottom Style: 1 7/8" Open with Slots 

The Unicel C-6601 R Compatible Pool & Spa Replacement Filter Cartridge is a spa or pool filter cartridge for the Four Seasons/Aqua Spa 25. The Filbur FC-3083 is a compatible replacement filter. The FC-3083 spa filters are polyester-pleated cartridges that cover a surface area of 25 square feet. Spa and swimming pool filters remove debris, bacteria, and other microorganisms to promote a safe and healthy water environment. The FC-3083 spa filter cartridges are able to replace the following manufacturer part numbers: Unicel C-6601, Pleatco PTL25W-P-4, and Aladdin 12529.