[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. [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. Easy to replace: dust bag design is simple and easy to use, easy to replace, no special tools or professional skills are required. Type:Vacuum Cleaner Accessories Product Name:Dust Bag Applicable Models: For Alpha 3 Pro For 11 Quantity:20PCS Colour:White Material:Non-woven fabrics Package Contents: 20 * Dust Bag 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.