Felji iRobot Roomba 600 & 700 Series Brush Kit Replacement Part # 21902 Maintain cleaning performance and reduce battery drain by regularly replacing Roomba's brushes. Brush Kit includes 2 bristle brushes with bearings, 2 side-brushes and 2 flexible beater brushes. Compatible with Roomba 600 and 700 Series, Gray Cleaning Head, only, with the exception of models 645 and 655. Brush Kit includes 2 bristle brushes with bearings, 2 side brushes and 2 flexible beater brushes. Designed & Engineered By Felji