[Compatibility] These replacement wheels are designed to be compatible with For H12/H13//M13S perfect for replacing the electric axle rollers of your vacuum cleaner. [Materials] These wheels are made of plastic, rubber and metal materials to provide durability and reliable performance during vacuuming. [Improve cleaning efficiency] By replacing worn or motorized shaft rollers, the smooth motion and operability of the vacuum cleaner can be restored to improve cleaning efficiency. [Extended service life] By replacing the electric shaft roller, the experience of using the vacuum cleaner can be improved and the service life can be extended. Colour:Black Material:Plastic+Metal Package Contents: 4x Replacement Wheels 4x Locking Pins 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.