** 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. Available from Top Glides in a rainbow of color choices. Which is your favorite? Get instant discount on 4 pairs! RECOMMENDED FOR INDOOR USE. ** Contact us for special bulk purchase discounts. For greater durability at a great price in 6 fun colors check our FlexFit Universal Walker Ski Glides.