The Leisure M-7418 R is a comaptible replacement for the following spa filters:
The Leisure Bay M-7418 Comp. Pool Filter Cartridge is a pool water filter specially designed with premium media and 100 sq. ft. of media area to improve the quality of swimming pool and spa water. This compatible Leisure Bay filter measures 7 1/2" x 20 13/16" with 2 15/16" Open top & bottom holes.