For the best results use your phone email me. 5and10bikerepair@gmail.com. Take a picture of your bike or product, this will give me a better idea how to serve you and send it in the email. Nature of the problem.  Tire and wheel size like 20, 24, 26, 27, 700 c So I know the wheel, tire and tube size. You can take a picture on the side wall of the tire. If not, you can just call, No problem! (814)470-6892.