The Sundance 6540-486 R is a compatible replacement for the following pool filters:
The Sundance 6540-486 Spa Replacement Filter is a spa filter cartridge featuring 35 sq. ft. of media area. This pool filter cartridge has dimensions of 4 5/8" x 16" with a 1 1/2" MPT bottom style. In addition, this compatible Sundance Spas filter has a closed top hole and Crescent Handle top style.