[Compatible] - Replacement dust bags only apply to for Roborock S8+ / S8 Pro Ultra / S7 MaxV Ultra / S7 Pro Ultra / Q7+ / Q7 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 will lock automatically when you lift the dust bag, completely sealing the dust bag inlet to ensure 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 at home, 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:B:8 PCS Colour:White Material:non-woven fabric Package Contents: 8 * 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.