... :2004 1. raw material: high quality cold rolled steel, book shelf plate thickness is changeable , all thickness is provided, such as ... 4 mm,....we could design and ,amufacture as your requirement for thickness.2 ,steelfiling cabinet appearance: modern design,it is look ... all kinds of office furnitures ,have engaged in this industy for more than 10 years, accumulated lots of experience. customizing : ...