[Fit Models] The replacement filter set is compatible with for AI Robot Vacuum AV2501S AV2501AE RV2502AE RV2520AOUS AV2510AOUS AV2511AE RV2610WA RV2610WD Smart AI Robot Vacuum Cleaners. Note: please check the compatible models before purchasing to avoid some unnecessary worries. [The Package Includes] 4 filters, 2 pre-motor filters. All are made of high quality materials. [Easy To Use] Easy to install and replace, no need other tools. Our filters work just as well as the parts. [Replace Tips] Please clean the filter frequently, replace the brush and filter every 2-4 months to keep the vacuum working with high-performance. If you find that your robot is noisy or doesn't work, please kindly check whether the rolling brush is stuck due to not cleaning hairs for a long time.<br><br>Please note: the physical slightly color difference or difference, does not affect the use,Please don't mind, thanks! Colour:Photo Color Material:plastic<br><br>Package Contents: 4 x filters 2 x pre-motor filters<br><br>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.