Hello Friend, Good day! I am Angela,sales manager of HQT CIRCUIT(UL, RoHS, ISO) Layers 2-26 Plated Gold,ENIG,HASL LF,HASL,OSP. Aspectect Ratio:14:1 Min. line width/space: 2.8mil External copper thickness: 16OZ If you are happen to need PCB supplier, welcome your any questions.Or you can keep my email for future contact. Tks a lot. See you in electronica 2016 in Munich( Nov 8-11th)! Best Regards, Angela Ding Sales Manager HQT Circuit (shenzhen) Limited Add: Penglianjia Science and Technology Park,Shibi Village, Pingdi Street Office,Longgang District,Shenzhen,China. Website: www.hqtcircuit.com Email&Skype: market6(a)hqtcircuit.com Mobile:0086 13825274100(whatsapp,wechat) QQ:2940304577 Tel: 0086 755 83393378 Fax: 0086 755 83422990