The heart of the pool cleaner is the filters. So replace the Maytronics Dolphin 4 Ultra Fine Filter Cartridge Panels as soon as they are worn or too dirty to clean.
This Ultra Fine Filter Basket Panels is compatible with Nautilus CC Robotic Pool Cleaners and Explorer E20. For Nautilus CC Plus, ultra fine filters are here.
You will get 4 per Pack (Packaging Quantity)