Description: 【Material】The walking ski glides are made of rubber material, Good anti slip properties. 【Size】Walker Glides are 3.15''x1.97'' in size, 1.10inch in inner hole size. 【Design】Sled design fine walking glides helps reduce noise and will not scratch surfaces or snag carpets or rugs. 【Easy to Install】Replacement Glide Caps are Easy to put onto walkers. More scratch resistant than walking glide balls. 【Security Walking】Walking Ski Glides are designed to inserted to the bottom of the legs of your walking to aid with smoother travel on most common surfaces, uneven floor. Walking accessories for indoor and outdoor use, ideal for home or public use. Specification: Material: Rubber Size Chart: 8cmx5cm/3.15inchx1.97inch Hole:2.8cm/1.10inch Package Includes:2 Walking Ski Glide(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.