9991408-R4 Ultra Fine Cartridge Filter for Dolphin Prowler 820, Prowler 830

9991408-R4 Ultra Fine Cartridge Filter for Dolphin Nautilus (old) model

9991408-R4 Ultra Fine Cartridge Filter for Dolphin DLX5, DX5S, Triton (old)

9991408-R4 Ultra Fine Cartridge Filter for Dolphin

1/8pack for Dolphin Replacement Part Ultra-Fine Filter Panels 9991422-R4

9991408-R4 Ultra Fine Cartridge Filter for Nautilus Deluxe 4 Deluxe 5

9991408-R4 Ultra Fine Cartridge Filter for Dolphin Advantage Plus (old) model

9991408-R4 Ultra Fine Cartridge Filter for Dolphin Quest, Edge, Discovery (old)