【Compatibility】: Compatible with Dolphin Nautilus CC Plus, M400, M500, Sigma, Odyssey, Oasis Z5i, Triton Plus (old), Aquarius XL, C3, C4. 【High Efficiency Filtration】: This pool cleaner filter removes dirt and debris from the pool, such as leaves, hair, dust and diatom, etc. makes your pool spotless. Keep your pool clean in the best condition. 【Premium Quality】: Stronger and durable ABS plastic frame. It firmly supports the filter layer and prevents it from breaking during work. 【Suggestion】: Premium ultra-fine filters can last 2-3 years. Rinse the filter every 4-6 weeks for optimal performance.