9991433-R4 Spring Cartridge Filter Panels, Maytronics Part Number: 9991432-R4. Replacement filters compatible with the following Dolphin Robotic Pool Cleaners: Nautilus CC Plus (not for Nautilus CC), M400, M500, Sigma, Odyssey, Oasis Z5i, Triton Plus (old), Aquarius XL, C3, C4. Dimensions: 10-1/2 inches x 6-3/8 inches. Lightweight design allows for easy filter replacement. Helps maintain clean and healthy pool water by capturing dust, leaves, diatoms, hair, and other debris, preventing secondary pollution. The filters are essential for optimal pool cleaner performance. Clean or replace filters when worn or difficult to clean to ensure maximum efficiency. Effectively removes 99.9% of particles including odors, smoke, pet dander, dust, and more down to 0.1 micrometre in size. Captures finer particles than HEPA H11 (0.3 micrometre). Features an ABS plastic frame with pleated fiber filtration media. Durable, washable, and reusable with a service life of 2–3 years. Rinse the filter every 4–6 weeks for best performance. Fine mesh construction effectively traps fine dirt, silt, sand, grass clippings, pet hair, and pine needles. The robotic pool cleaner scrubs both pool walls and floor without requiring the main pool pump to run. Color: Black + White. Material: Plastic. Package includes: 8 x Pool Filters. Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement allowance: +/- 1–3 cm.