Compatible with Sora 10 only, designed as a supplementary solution for capturing ultra-fine debris that the standard debris basket cannot process. - 5L capacity, ultra-fine filter: - The outer layer is a support frame designed to hold the inner non-woven filter. It cannot be used independently. - Inner non-woven fabric filter must be used in conjunction with the coarse filter basket and can not be used independently. It provides filtration precision of up to 3μm for ultra-fine debris such as fine dust and algae. - Recommended lifespan: 40 cleaning cycles (150 hours of cleaning operation). Once the cycle limit is reached, or if any of the following conditions occur, it is recommended to purchase a replacement: a. The non-woven fabric remains noticeably grayed out or hardened after washing. b. The overall debris suction capability of the machine decreases. - Features a foldable handle for convenient installation and removal. Recommendation: Use the origianl Standard Filter Basket for the initial cleaning to remove large debris, then replace it with the Ultra-Fine Dual Filter Basket for finer debris collection. Using the Ultra-Fine Dual Filter Basket first may cause rapid clogging and affect normal cleaning.