Replacement filter panels works with the following Dolphin Robotic Pool Cleaners: E10, Nautilus CC, Saturn, Advantage, Proteus DX3, S50, S100, Active 10/15, T15, T25, Echo, Solo, Encore, Escape, Cayman, Prowler 910/917, Warrior SL.
Maytronics part number: 9991466-R4
Maytronics Certified Genuine Parts. Keep your Dolphin pool cleaner in it's best condition.