Hangzhou shine tire co.,ltd is located in Hangzhou zhejiang province, it was established in 1996. and we can produce good quality butyl inner tubes ,natural inner tubes and flaps. we have sold the tubes both in the domestic and foreigh markets, till now ,we have exported our products to many other countries, for example, Brazil,Algeria,America, Russia, Pakistan ,Malaysia and so on. if you have interest .please don't hesitate to ask me .