material: fr4 layer coverage:6layer thickness:1.6mm surface finish:osp/entek line width/space:4.6mil/6.6mil solder mask colour:green our factory mainly produce the pcb in shajing town baoan DIST.shenzhen city P.R.China.we can produce the double sided pcb.multilay board.FPC.lumileds board and high density interconnecting.and the surface handly have Immersion silver/au/ni/cu.and lead free HASL.and the copper suface have FLUX.WPF-21.F2.ENTEK and etc.which are the most advantage of our factory in the pcb filed.we have the ISO9000 Standard.ISO14001.TS16949 and so on international standard credit .of course .we can also provide the competitive price and the highest quality for each customer.i believe production capability of our factory can be up to strict requirement of your comapny.we have condition for satisfaction you.so i hope we can build the long --term friendship.and wish you to become business partner of our factory forever. pls dont hisate to contact me if you are interested in our factory!