- High-Performance: The tire grain design on the bottom provides enhanced slip resistance, strong grip, effective drainage, and efficient exhaust. - Wear-Resistant: Features a built-in steel cushion to reinforce the tips. Offers wear resistance up to three times greater than standard natural rubber. - Designed with a tread pattern similar to a car tire for improved ground contact. - Provides excellent adhesion, grip, exhaust, and drainage performance to help ensure user safety during walking. Specification: - Material: Rubber - Size Chart: 16mm: Inside Diameter: Approx. 1.6 cm / 0.63 inch Height: Approx. 4.5 cm / 1.78 inch Bottom Width: Approx. 3.5 cm / 1.38 inch 19mm: Inside Diameter: Approx. 1.9 cm / 0.75 inch Height: Approx. 5 cm / 1.97 inch Bottom Width: Approx. 3.6 cm / 1.42 inch Package Includes: 4 Pieces Rubber Crutch Tips Note: Size may vary slightly due to manual measurement, with a possible 0 to 1 cm error, which is considered normal. Due to differences in monitor displays, the actual color of the item may vary from the picture.