[ HIGH-QUALITY ]: Walker Glide Balls are made of chemical fiber and natural rubber, which is smooth and quiet when being used [ WIDELY APPLICABLE ]: In addition to using as walker tennis balls, they can also fit on furniture legs, such as chairs, stools, tables, etc. They can prevent floor scratches and noise from dragging furniture [ EASY TO USE ] Our high quality tennis balls fit most walkers and are pre-cut to make installation easier and safer. Just slip them on and go [ YOU WILL GET ] : 4 PCS Precut Walker Tennis Balls.If you encounter problems, you can contact our after-sales team Walker Tennis Balls