Keep your robotic pool cleaner working efficiently with our ultra-fine filter replacement. Improve water quality with this high-quality replacement filter 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 operation. Constructed with a heavy-duty ABS plastic frame and super-fine PET filter paper, the pleated design firmly supports the filter layer and prevents breakage during use. 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. Note: Only the items listed are included. Light reflection and display differences may cause slight color variations between the image and actual product. Measurement may vary by +/- 1-3 cm.