Increase the efficiency of your spa with the PMT50 replacement cartridge filter. Designed specifically to replace Cal Spas cartridge, Sundance 6540-497 cartridge, and Martec CL-2807 cartridge. It allows for a stronger water flow and less restriction, resulting cleaner water and more enjoyable spa experience.

Dimensions: Diameter 4 15/16" x Length 14 7/8" x 2 1/8" Opening