Filter Cartridge Kit Ultra Fine, suits M4, M400, M500 Dolphin 4-Pack/Kit of 4
9991432-ASSY - Ultra Fine Cartridge Filter Kit is used for the Dolphin Supreme M4, Dolphin M400, Dolphin M500, Trident Pro, Trident Supreme, Supreme M5, Supreme M5 Liberty, Dolphin Optima Plus Liberty, Trident Pro Plus, Trident Plus, Dolphin Bio Suction, and the Dolphin Wave Liberty.