As part of standard maintenance, it can be easily accessed and replaced. Improved Cleaning: The soft plush strips help the vacuum cleaner to better absorb dust and dirt, improving cleaning efficiency, while the wheels provide smooth and effortless movement. 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. High-Quality Materials: Made from materials, our soft bristle strip and wheel kit is built to last and withstand even the toughest cleaning jobs. Prevent the direct contact between the soft roller cleaner head and the floor, reducing friction and scratches on the floor, thereby protecting the floor and the of the soft roller cleaner head from scratches. [Important Function] If you don't replace the broken soft brush strips and badly worn wheels, the suction power of the vacuum cleaner be seriously affected and the cleaning resistance be extremely increased, even causing serious scratches on your hardwood floor. Type:Vacuum Cleaner Accessories Colour:Gray & Blue Material:Plastic + Package Contents: 4 * highly wear- Wheels 4 * Axels 1 * Elbow Tweezers 1 * screwdrivers 3 * Soft Plush Strips (1pcs Long 23cm, 2pcs Short section:11.5cm) 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.