The diameter of this roller brush is 5cm, The diameter must be measured,If it is 4.5cm, please do not choose this one. Suitable for V8.Suitable for 4-hole roller brushes, not suitable for 3-hole roller brushes, width: 240mm.Please check whether the appearance and size of the roller brush match before ordering. Made of high-quality material , practical, durable and long lasting.Nice accessory to improve the performance of your vacuum cleaner.A quiet and clean rolling brush design significantly reduces the sowing noise and leaves quiet space for your family Easy to remove dirt, dust and garbage from corners and sides, especially your hair and pet hair. Does not damage floors or furniture. Easy to remove and replace. To maintain optimal performance from your vacuum cleaner, replace the vacuum cleaner attachment every 2-3 months. Package Included: 1 x Brush Roll. If you encounter quality problems or other problems during the purchase process, please contact us in time. We will help you solve the problem as quickly as possible.