... GCC, ECE, DOT, SONCAP, CCC, ISO As the long term inner tube supplier of our bus company and Qingdao port yard ... ,usually in China this indication is 8.0Mpa.Only some inner tubes from Korea can reach 9.0MpaTensible Stretch: 600%,this ... , U.A.E, Iran, and many other countries. 6.Certificates: Inner tube tires