1. Durability: Made of materials that offer good durability. 2. Exquisite and delicate: Well - matched with the equipment. 3. Efficient robot cleaning filter: Can remove dirt and debris in the swimming pool, like leaves, dust and diatoms, helping to keep the swimming pool clean. 4. Plastic frame: Relatively durable, and can firmly support the filter layer to prevent it from breaking during operation. 5. Washable and reusable: If used properly, these filters can last for 2 - 3 years. Rinsing the filters every 4 - 6 weeks can help maintain good performance. 6. Compatibility: Suitable for Dolphin Nautilus CC Plus, M4, M5, M400, M500, M200, Dolphin Triton Plus, Dolphin Wave 65 robot pool cleaners (not applicable to Nautilus CC). 7. Same model: The same as model 9991432 - R4. 8. Color: Black + White 9. Material: Plastic 10. Size: 26.5 x 17.5 x 1.5 cm 11. Package contents: 4 ultra - fine filters 12. Precautions: Only the above package contents are included, no other products. Due to light reflection and different monitors, the color of the item in the picture may vary slightly from the actual one. The measurement tolerance is ±1 - 3 cm.