.Baigong Industrial has become the largest cylinder manufacturer in China since its establishment in 1953.We provide all kinds of gas cylinder including ISO11439:2000 OD219mmOD232mm OD325mm OD356mmOD406mm, capacity from 20L-200L,ISO11120 cylinder for CNG trailer,ISO9809-1 cylinder for CNG station,etc. We export cylinders to more than 35 countries and our brand enjoy world wide fame for quality and service.