This product is made of natural rubber or butyle rubber and it has the better flexibility and durable. A t the same time, it is welcomed both in domestic market and European market. We can manufacture various types of this product, like 2.25-19, 2.50-4, 2.50-17, 2.50-17-1, 2.50-17-2, 2.75-14, 3.00-8, 3.00-10, 3.00-16, 3.00-17, 3.00-18, 3.00-18-1, 3.25-8, 3.50-8, 3.50-10, 3.50-16,3.50-18, 3.50-19, 4.00-8 If you are interested in any types, please contact us as soon as possible.