9991433-R4 Spring Filter Panels, Part Number: 9991432-R4. Replacement filters compatible with the following Dolphin Robotic Pool Cleaners: CC Plus (not for CC), M400, M500, , Oasis Z5i, Triton Plus (old), XL, C3, C4. Dimensions: 10-1/2 inches x 6-3/8 inches. Designed for easy filter replacement, helping maintain clean and efficient pool cleaning performance. A fresh filter helps capture dust, leaves, diatoms, hair, and other debris, preventing secondary pollution. The filter is essential for optimal pool cleaner operation. Clean or replace filters when worn or excessively dirty to maintain performance. This pleated fiber filter with ABS plastic frame is durable, washable, and reusable, offering a long service life of 2–3 years. Rinse the filter every 4–6 weeks for best results. Fine mesh construction effectively traps silt, sand, grass clippings, pet hair, pine needles, and fine dirt particles. Captures particles as small as 0.1 micrometers, providing filtration efficiency above HEPA H11 standards (0.3 micrometers). Removes 99.9% of particles including dust, pet dander, smoke, and odors. Features: 1. Operates independently of the pool pump. 2. Robotic cleaner scrubs pool walls and floor. 3. Micro-screen filter captures fine contaminants. Color: Black + White. Material: Plastic. Package Contents: 8 x Pool Filters. Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement allowance: +/- 1–3 cm.