and high quality, made of high-quality materials for enhanced durability Exquisitely designed and precisely engineered to match the equipment High-efficiency robotic cleaning filter effectively removes dirt, debris, leaves, dust, and diatoms from swimming pools, helping keep your pool clean and spotless Durable plastic frame provides strong support to the filter layer and prevents breakage during operation Washable and reusable; these filters can last 2–3 years with proper use. Flush the filter every 4–6 weeks for optimal performance Compatible with: Dolphin Nautilus CC Plus, M4, M5, M400, M500, M200, Dolphin Triton Plus, Dolphin Wave 65 robot pool cleaners (NOT compatible with Nautilus CC) Equivalent to model 9991432-R4 Color: Black + White Material: Plastic Size: 26.5 x 17.5 x 1.5 cm Package Contents: 4 x Ultra-Fine Filters Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1–3 cm