Zodiac R0357500 Clamp Ring Knob Assembly with Threaded Rod and Retainer Replacement for Select Zodiac D.E. and Cartridge Pool and Spa Filters Clamp ring knob assembly replacement Fits Zodiac CV and CL series cartridge pool and spa filter models CV340, CV460, CV580, CL340, CL460, CL580 Also fits Zodiac Jandy DEV and DEL series D.E. pool and spa filter models DEV48, DEV60, DEL48, DEL60 Includes threaded rod and retainer