Compatible with ilife A9s A9 A7, Silvercrest SSR1 SSRA1 robot vacuums. Roller brush kits are replaced regularly to help improve machine efficiency. The side brush easily removes dirt, dust and litter from the corners and edges of accessories, especially human and pet hair. The side brush can be rolled up in the pouch, this which is normal, just put it in hot water (about 80°C) for a few minutes to recover. Easy to install and replace. Color: black+yellow material: plastic Size: 16.3cm Package Persistence: 1 x Main Brush 1 x Main Brush Cover 4 x Side Brushes Package Content Above only, other products not included. Note: Different lighting and monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement tolerance is +/- 1-3 cm.