knock down metal book shelf 1,Simple and functional 2,On time delivery 3,20 years experience 4,Offer OEM,ODM Knock-down structure metal book shelf,bookcase:Specification(mm):H2235*W1005*D450 H2230*W950*D450Material:High quality cold rolled steel sheetThickness:0.5-1.0mm The material we used are all cold rolled steel, steel thickness have 0.5mm,0.6mm,0.7mm,0.8mm ,this rely on customers' ...