GOOD COMPATIBILITY: The replacement ultra-fine cartridge filter plate is fully compatible with CC Plus, M400, M500, Z5i, Triton Plus (old version), XL, C3, C4. Part number 9991432 R4 is an ideal upgrade for pool cleaners. Highly Efficient Filtration: The ultra-fine and robust filter paper of this pool filter cleaner traps more debris than ordinary filter paper, removing dirt and debris from your pool, such as leaves, hair, dust, and diatoms. Keep Your Pool Clean: The replacement cartridge filter cleaner will keep your pool spotless, the cartridge is designed to filter more particles to improve pool filtration and maintain optimal cleanliness. Long Life: The Premium Ultra Fine Filter will last 2-3 years. Please rinse the filter every 4-6 weeks for optimal performance. Thick Filter Material: The pool cartridge cleaner is made of ABS plastic for strength and durability. The pool cleaner filter is made of a plastic frame and thick filter material, which can withstand rough and frequent