Eztronics Corp&reg; 2-pack Replacement Brush Kit Side Brush Beater Bristle Brushes for Roomba 600 700 Series 760 770 780 Maintain cleaning performance and reduce battery drain by regularly replacing Roomba's brushes. Compatible with Roomba 600 and 700 Series, Gray Cleaning Head, only, with the exception of models 645 and 655. performance. Brush Kit includes 2 bristle brushes with bearings