Ultra-Fine Pool Filter for Dolphin M4/M5/M400/M500 Robot Cleaner, Washable & Reusable (4 Filters + Brush) Ultra-fine Filters Pool Cleaner Filter 9991432-r4 Pool Filter Compatible Dolphin M400 M500 Ultra-fine Filt-b Exquisite and delicate, highly match with the equipment High-efficiency robotic cleaning filter removes dirt and debris from the swimming pool, such as leaves, dust and diatoms. It makes your swimming pool spotless. Plastic frame, more durable. At the same time it can firmly support the filter layer and prevent it from breaking during operation. Washable and reusable, these filters can last 2-3 years if used properly. Flush the filter every 4-6 weeks for best performance.Compatible with: For Dolphin Nautilus CC Plus, M4,M5,M400, M500, M200 , For Dolphin Triton Plus ,For Dolphin Wave 65 robot pool cleaners.(NOT for Nautilus CC) Colour: White+Black Material: plastic Package Contents: 4 x Ultra-Fine Filters 1 x Cleaning Brush Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.