These high quality tennis balls fit most walkers and are pre-cut to make installation easier and safer. The soft felt exterior is quiet and perfect to help protect floors. Recommended for indoor use. Available from Top Glides in a rainbow of color choices. Which is your favorite? Get instant discount on 2 pairs, 4 pairs or more! Contact us for special bulk purchase discounts. For greater durability at a great price in 5 fun colors check our FlexFit Universal Walker Ski Glides.