[Perfect Compatibility]The replacement dust bags are perfectly compatible with for X40/ X40 Pro/ X40 Ultra/ X30 Pro Ultra/ X30 / L10s Pro Ultra/ L10s Ultra Gen 2. Please kindly check your robot vacuum model before purchasing. Please be noted that: This is not an Part Number product. Any use of the name or model name is intended solely to demonstrate compatibility of this product. high quality dust bags compatible with for X40/ X40 Pro/ X40 Ultra/ X30 Pro Ultra/ X30 / L10s Pro Ultra/ L10s Ultra Gen 2. It is a cost-effective choice to supplement the dust bags spare pack for your robotic vacuum. [Premium Materials]The for X40 Ultra dust bags are made of melt-blown fiber filter materials and non-woven fabrics, which can effectively block dirt, pollen and small dust particles etc. The non-woven fabric can be decomposed within 1-2 months under natural conditions and not have any pollution to the environment. [Newest Upgraded Dust Bags]Our for X40 Ultra Dust Bags of the latest version are