Pack of 6 high-efficiency spring filter cartridges designed to capture large debris without quick clogging. Each measures 10.5 inches x 6.375 inches, ideal for use after pool openings or in pools with heavier-than-usual debris. Compatible with Dolphin Robotic Pool Cleaners: CC Plus, Z5i, XL, C3, C4, M200, M400, M500, M5, Bio, Triton Plus (old), Liberty, Wave 65, and Wave 90. Part number: 9991433-R4. These spring filter cartridges are designed to trap larger debris while allowing fine particles to pass through, helping prevent rapid clogging when the pool is especially dirty, such as during spring opening. Durable plastic frame construction. Premium spring filters can last 2–3 years. Rinse the filter every 4–6 weeks for optimal performance. Helps protect the pool cleaner by preventing dust and larger particles from entering the system, reducing wear and tear, and promoting efficient operation to extend engine life and maintain consistent performance. Replacement number: 9991433-R4 Color: Black + White Material: Plastic Package contents: 6 x Pool Cleaner Filter Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1–3 cm.