Keep your robotic pool cleaner working efficiently with our ultra-fine filter replacement. Improve water quality with this high-quality filter replacement designed for compatible robotic pool cleaner models including Dolphin Premier, DX6, Deluxe 4, Deluxe 5, DLX4, DLX5, DX5S, Triton (old), Quest, Edge (old), Advantage Plus (old), Wave 75, Prowler 820, and Prowler 830. The ultra-fine sturdy filter paper captures sand, sediment, and debris more effectively than standard fabric, allowing for greater debris reduction. Features thick pleated fabric with a strong plastic support frame to maintain shape and resist deformation during water flow. Constructed with a heavy-duty ABS plastic frame and super-fine PET filter paper in a pleated design, it firmly supports the filter layer and prevents breakage during operation. Rinse the filter every 4 to 6 weeks for optimal performance. Replacement number: 9991425-R4. Color: black and white. Material: ABS. Package includes: 6 x pool cleaner filters. Only the items listed are included; other products are not part of this package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement tolerances may vary by +/- 1-3 cm.