Pack of 2 ultra-fine pool filters compatible with Dolphin M400, M500, Nautilus CC Plus, 9991432-R4

[Premium Material] The ABS plastic frame is stronger and more durable, offering maximum hydraulic efficiency and overall structural stability. Selected fabrics with ultra-fine pleats provide more pleats and improved filtration efficiency.[Perfectly Compatible] Compatible with Nautilus CC Plus (not for Nautilus CC), Dolphin Supreme M400, M500, M200, Oasis Z5i, Odyssey, Sigma, C3, C4, Triton Plus (alt), and Aquarius XL robotic pool cleaner filters.[Efficient Filtration] Thanks to the clever pleat design, the filter is cleaned more thoroughly, resulting in cleaner pool water. The ultra-fine filter surface captures sand, leaves, hair, and dirt better than normal fabrics for maximum filtration efficiency. Part Number: 9991432-R4. Like the original pool cleaning filter. Premium ultra-fine filters last 2-3 years. For optimal performance, it is recommended to rinse the filter every 4 to 6 weeks.