General description The Dolphin Robot Filter Pack includes 4 ultrafine cartridge filters designed for Maytronics Dolphin Nautilus CC Plus, M400, and M500 pool robots. These filters are essential spare parts that ensure efficient cleaning by capturing ultrafine debris such as fine sand, algae, and leaves. Technical specifications Dimensions: 10.43" x 6.3" Material: ABS plastic frame Filter Type: Ultrafine filtration Expected lifespan: 2 to 3 years with proper use Compatibility and accessories Compatible with Delphin Nautilus CC Plus Compatible with Maytronics Dolphin Parts 9991432 Compatible with Dolphin M400 and M500 Compatible with Delphin M4 and M5 pool cleaners Compatible with Delphin Orion, Deluxe 3, Atlantis, Apollo, Apollo Plus, DX3, DX3s, DX4, DX4s, Sigma, Odyssey, Oasis Z5i Usage Rinse the filter every 4-6 weeks for optimal performance. Always follow the filter's instructions for use when changing the filter.