Made of high quality materials for durability Empty the tank quickly and efficiently without releasing harmful dust to the environment As part of normal maintenance, it can be easily removed and replaced It is best to replace the spare parts every 2 to 3 months to keep the machine running at performance Due to different batches, there may be differences in product appearance and printed text, which not affect use for W2 Robot Vacuum Cleaner Accessories Colour:As Shown Material:Non-Woven Fabrics Package Contents: 20x 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.