The information below is per-pack only 【Easy to Use】Our tennis balls are pre-cut to make installation easier and safer. 2 inch cross section, fits most walkers. Just slip them on and go. 【Durable Material】Tennis Balls are made of felt and natural rubber, which is smooth and quiet when being used. Heavy duty and long lasting. 【Multiple Uses】Perfectfor walkers, chairs, tables, beds, sports equipment, etc. Protect the floors and carpets from scratches, reduce the noise. 【Package Includes】4PCS Precut Walker Tennis Balls, which can meet your need of different use. If have any problems about these precut walker tennis balls, please contact us any time. We will try our best to solve the problems for you.