[Compatible] - Replacement dust bags only apply to for S8+ / S8 Pro Ultra / S7 MaxV Ultra / S7 Pro Ultra / + / Max+ / Q5+ Robot Vacuum Cleaner. Please kindly check your machine model before ordering. [Good Sealing] - The dust bag is made of melt-blown fabric and non-woven fabric, combined with the cleaning station can effectively capture 99.7% of ultra-fine dust down to 0.3 tiny particles. [Auto Lock] - It lock automatically when you lift the dust bag, completely sealing the dust bag inlet to dust and dirt stay inside the bag. [Tips for Use] - In order to keep your robot running at its best, please clean and replace parts in time. If you have allergies and pets , it is recommended to replace the dust bag every 2-3 weeks. Replace the old, broken or dirty Dust Bag, and improve the cleaning ability and effect of the cleaning robot Quantity:A:12 PCS Colour:White Material:non-woven fabric Package Contents: 12 * Dust Bags Only the above package content, other products are not included. Note: Light reflection 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.