this is The high quality metal model produced by the ultra precision laser cutting. Metal model is use of superfine processing of metal sealing by laser radar, and then parts removed, like metal process as bending, folding and then plug in, you can create a world model as small palm size. 30 kinds of products include 1~3 pieces puzzle boards, the most simple product have only one piece of puzzle board and just need 30 minutes to finish it, but the most difficult product there are 3 pieces of puzzle boards and need more than 3 hours to finish. size : 12.5X9.5X14.7cm