... .Choose the high quality cold-rolled steel plate and the famous brand locks.4..Adopting the 9-position tunnel’s automatic electrostatic ... order to store books.Accessories(per group):The body frame:12 pieces shelves,6 pieces bookend bars, 12pcs hanging plates, two ... ,one top plate and 2 pieces tie rodsThe sub-frame:12 pieces shelves,6 pieces bookend bars, 12pcs hanging plates,one ...