This product is made of caoutchouc 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 2.50-42.80-43.50-43.00-44.00-43.50-63.50-84.00-64.00-84.50-8. If you are interested in any types, please contact us as soon as possible.