Qingdao Yongchang Iron is a factory 17 years specialized in manufacturing various plastic & iron products. Factory located in Qingdao, mainly for exporting .. Products Including: Plastic catalog : multilayer bags , vacuum bags, high temperature boil bags , aluminum foil bags , zip-lock bags , color printed bags , pet food bags , frozen bags and heavy duty bags . Steel catalog : fence , barrier , steel gate , shopping trolley , cart , wire container , wire shelf , roll container , steel bin .