9991468-R4 Ultra Fine Filter with Dolphin S50, S100, Active 10 15 T15 T25 E10…
9991468-R4 Ultra Fine Filter with Dolphin S50, S100, Active 10 15 T15 T25 E10 Explorer E20, Nautilus CC, Echo, ,Proteus DX3, Cayman, Escape Series Robotic Pool Cleaners. Make sure to rinse the filter every 4-6 weeks for optimal performance.