Description:_x000D_ - High-Performance: The tire grain design of the bottom is more non-slip, providing strong grip, strong drainage, and strong exhaust._x000D_ - Wear-Resisting: Built-in steel cushion to reinforce the tips. Its wear-resistance is three times more than that of ordinary natural rubber. _x000D_ - Its design is similar to touch the ground at the bottom of a car tire texture shape._x000D_ - Adhesion, grip performance, exhaust, drainage properties are strong,Effectively ensure the safety of the user walks._x000D_ _x000D_ Specification:_x000D_ - Material: Rubber_x000D_ Size Chart:_x000D_ 16mm_x000D_ Inside Diameter: Approx 1.6 cm/0.63 inch_x000D_ Height: Approx: 4.5 cm/1.78 inch_x000D_ Bottom Width: Approx. 3.5cm/ 1.38inch_x000D_ 19mm_x000D_ Inside Diameter: Approx 1.9 cm/0.75 inch_x000D_ Height: Approx: 5cm/1.97 inch_x000D_ Bottom Width: Approx. 3.6cm/ 1.42inch_x000D_ _x000D_ Package Includes:_x000D_ 4 Pieces Rubber Crutch Tips_x000D_ _x000D_ Note:_x000D_ Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon._x000D_ Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!