TIPS. For keep your robot vacuum cleaner running at for peak performence, please changing the the consumable replenishment kit every 2~3 months, depending on your use frequency. DURABLE. These replacement parts are made of durable nylon brushes, which can remove dirt dust and trash in corners and edges, easily clearing up housework keep the floor clean. EASY TO REPLACE. Simple installation, no other aids required. Perfect repair accessoty for llife series robot vacuum cleaner. PREMIUM QUALITY. The replacement cleaning brush adopts high quality and eco-friendly material, durable and reusable. SIZE DETAIL. Size 3.35 inches. for Ideal for llife series robot vacuum cleaner, including V3/V4/V5/V6 Robot Vacuum Cleaner.