Easy to Use: This stick-on bike tire patch kit is very simple and can be done quickly with minimal tools All you need to do is start by cleaning the punctured area on the inner tube and rasp the area where the hole is Peel the back film of the patch to expose the adhesive side. Apply a patch over the puncture. Press firmly for 30 seconds to allow the patch to bond to the inner tube and re-inflate the tire Reliable and Durable: This self-adhesive bike patches are made of high-quality material, flexible, durable and strong adhesion Please note that the patches will not stay on forever and will eventually come off. Factors such as how much and how often you ride, the tire pressure, the bike weight, and the changing temperature will play a role in the wear and tear of the patch. type:Round/Square Colour:Black Material:Foam Package Contents: 30 x bicycle tire patch Only the above package content, other products are not included. Note: Light reflection 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.