As part of standard maintenance, it can be easily accessed and replaced. [Perfect Compatibility]The wheels set are perfect replacement for Dyson V6 V7 V8 V10 V11 (the Wheels ONLY Suitable for Soft Roller Head for Hardwood Floor Cleaning,NOT Suitable for Roller Brush Head for Carpet Cleaning) It is recommended to replace the spare parts every 2 to 3 months, depending on the frequency of use, so as to maintain the best performance of the machine. Easy to Install: The kit comes with everything you need for easy installation. Simply snap the strips and wheels into place and you're good to go. [Important Function]If you don't replace the broken soft brush strips and badly worn wheels, the suction power of the vacuum cleaner will be seriously affected and the cleaning resistance will be extremely increased, even causing serious scratches on your hardwood floor. color: gray material: plastic Package Contents: 4 x highly wear-resistant Wheels 4 x Axels 1 x Elbow Tweezers 1 x screwdrivers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.