1. Japan technologh, Bridgestone stylist, automatic producing line, five-star 2. Passed GCC, ECE, DOT, SONCAP, CCC, ISO As the long term inner tube supplier of our bus company and Qingdao port yard who is in charge of the all the truck in Qingdao port,We can supply you with the best quality from China.Tensible Strength:9.0Mpa,usually in China this indication is 8.0Mpa.Only some inner tubes from ...