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. Featuring thick pleated fabric with a strong plastic support frame, the filter maintains its shape and resists deformation during operation. Constructed with a heavy-duty ABS plastic frame and super-fine PET filter paper, it provides durable support and prevents breakage. 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 included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.