This item is a pair of bike crank arm protective boots. Worth your buying! Warm Tip: Please check out the size to make sure it will fit your bike before Add to Cart. Material: Silicone, high elasticity, high wear resistance and high resistance to tear Color: Black, Red, Blue, Green, Yellow, White, pink, transparent Size: 1.7 X 1.26 X 0.7 inch(As the picture shows) Features: Super elastic， The more perfect package crank.circumstances. Silicone is non-toxic and environmentally friendly. It is superior to plastic in terms of high temperature resistance, aging resistance and impact resistance. Functions: 1.Prevent the crank wear surface and scratch. 2.Flexible, tensile, variety of colors beyond dental plate protection is also a decorative. 3.360 degree comprehensive protection, refuse to shave. 4.Abrasion resistance and anti-avulsion. 5.High elasticity, practical and firm.Suitable for most bike crank arms. 6.It's a good gift for you loving bike,it can protect your like better. Package List: 1 Pair of Crank Arm Protectors (2 pcs) Note: 1. Please allow 0-1mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.