- High-Performance: The tire grain design on the bottom provides excellent slip resistance, strong grip, efficient drainage, and effective exhaust. - Wear-Resistant: Reinforced with a built-in steel cushion to strengthen the tips. Offers three times the wear resistance of standard natural rubber. - Designed with a tread pattern similar to a car tire for optimal ground contact. - Provides strong adhesion, superior grip, and excellent exhaust and drainage performance to help ensure user safety while 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 measurements are taken manually and may vary by 0 to 1 cm; this is considered normal. Due to differences in monitor displays, the actual item color may vary slightly from the images shown. Thank you!