These replacement parts are nylon brushes, which can remove dirt and trash in corners and edges, easily clearing up housework keep the floor clean The replacement cleaning brush adopts and, and EASY TO REPLACE Simple installation, no other required Perfect repair accessoty for llife series robot SIZE DETAIL Size 3.35 inches for Ideal for llife series robot, including V3 / / V5 / Robot TIPS For keep your robot running at for performence, please changing the the consumable replenishment kit every 2~3 months, depending on your use frequency