My company specializes in producing anchor bolts with metal bellows, full name should be concrete, prestressed corrugated metal pipe, also known as concrete-filled tubes, bellows anchor bolts, anchor bolts with sleeves, metal spiral and so on. It is a thin strip made of helically wound round corrugated tube, while the winding process and the extrudate seams crimping punch ripples. Our Features: 5 pressure wave, high strength bite, light weight, stiffness, tightness is good, strong adhesion pullout. Another common good, interchangeability, supporting reasonable, easy to use features. Stable quality, reliable performance, outstanding performance, the main results are: Beijing Shougang Qian'an Iron and Steel Plant, Anshan Iron and Steel Plant, Henan Han Ye Iron and Steel Plant, Panzhihua Iron and Steel Co., Ltd., Guangdong Shaoguan Iron and Steel Plant, Shanxi Antai Group jiexiu steel plant, Shandong Laiwu steel mills, Xiwang Special Steel, Shandong Shouguang Juneng Special Steel, Aluminum Group, etc. http://www.shiditg.com/ ICT