Replacement filters works with the following Dolphin Robotic Pool Cleaners: DX6, Triton, Edge, Wave 75, Deluxe 5, Discovery (old), Prowler 830, DX5+S, Deluxe 4, Premier, Quest.
Maytronics part number: 9991408-R4
Maytronics Certified Genuine Parts. Keep your Dolphin pool cleaner in it's best condition.