The clean and clean wall does not need to install a hole punch, and it can be installed directly with double-sided tape. The C clip part is made of steel material, and the part in contact with the tire is made of silicone anti-collision material, which can prevent collisions well. The opening distance can be adjusted manually according to the tire, and the clamping force is better. Easy to install: For bicycles, easy to install and store. Perfect choice: Space saving, perfect for corner storage in sheds and garages, easy to install with the included hardware. Features: Colour:Blue+carbon black Material:Carbon fiber backplane + silicone roller Size:8x6x3.5cm Package Contents: 1* Bicycle parking rack 3* screw 3* Expansion tube 1* Carbon drill maintenance wall sticker 1* Double-sided tape Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.