Compatible with for ilife A9s A9 A7,Silvercrest SSR1 SSRA1 robot vacuum cleaners The roller brush kit is replaced regularly and helps to improve the efficiency of the machine Side Brush easy to remove dirt, dust, and trash in corners and edges from the accessories, especially human hair and pet's hair The Side Brush may be winding in its small packing bag, this is normal, just put it in hot water (about 80 ) for several minutes to recover Easy to install and simple to replace Colour: black + yellow Material: plastic Size: 16 3cm Package Contents:1 x main brush1 x main brush cover4 x side brushes Only the above package content, other products are not included Note: Light shooting 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