Efficient Filtration---The ultra-fine and heavy-duty paper with more pleats for maximum filtration efficiency, easily removes debris, keeping your pool sparkling. This pool filter removes dirt and debris from the pool such as leaves, hair, dust and diatoms, etc. Premium Material---ABS plastic frame is stronger and more durable. Part number is 9991432 R4. A good modification part for pool cleaner. Good Compatibility---Replacement ultra fine cartridge filter panels are perfectly compatible for CC Plus, for M400, for M500, for Z5i, for Triton Plus (Old), for XL, for C3, for C4. Keeps Your Pool ---Replacement robotic pool cleaner filters keeps your pool spotless and keeps your pool cleanliness at its best. Service Life---The filter is easy to for reuse, greatly saving your money on the water bill, providing you with more time to enjoy the pool. Premium ultrafine filter lasts 2‑3 years. Please flush the filter every 4‑6 weeks for the best performance.