Zhucheng Yongbang Pipe Co., LTD. is located in Zhucheng,Shandong,China. Yongbang is a professional manufacturer of high quality stainless steel vacuum bellows,corrugated hoses and other standard vacuum components. We make vacuum bellows range from DN10 to DN300 mm.Our products are widely used in college laboratories, semiconductor industry, vacuum coating engineering, LED Industry, solar energy, nuclear and other scientific and industrial markets.