[Compatible] - Replacement dust bags are only applicable to Roborock S8+ / S8 Pro Ultra / S7 MaxV Ultra / S7 Pro Ultra / Q7+ / Q7 Max+ / Q5+ robot vacuum cleaners. Please check your machine model before ordering. [Good sealing] - The dust bag is made of melt-blown fabric and non-woven fabric. In combination with the cleaning station, it can effectively capture 99.7% of ultra-fine dust down to 0.3 small particles. [Automatic locking] - It automatically locks when you lift the dust bag and completely seals the dust bag's entrance to ensure that dust and dirt stay inside the bag. [Usage tips] - For your robot to operate optimally, please clean and replace parts in time. If you have allergies and pets at home, it is recommended to change the dust bag every 2-3 weeks. Replace the old broken or dirty dust bag and improve the cleaning capacity and effect of the cleaning robot. Quantity: A: 12 pieces Color: White Material: non-woven fabric Package contents: 12 * Dust bags Only the above package, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.