Easy to replace, pay attention to cleaning and replacement parts, so that the cleaning robot can maintain good performance. The filter is fully protected. To filter the dust in the air, the filter maintains the cleaning performance of the vacuum while reducing the penetration of dust. Easy to install and durable vacuum cleaner, the brush collects dust in the same way. For best results, the filter should be replaced every 1-2 months. Applicable models: for 3090 series Colour:Blue+black Material:Plastic+cloth Package Contents: 1x main brush 3x filter 6x side brush 2x drag 1x cleaning brush 1x small brush 1x screwdriver 12x water core Only the above package content, other products are not included. Note: Light 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.