... ,SGS,IPC 3.Prompt delivery 4paned size487*260mm PCB for USB productsSpecification:1.Factory Price 2.Certification:UL, ISO9001,SGS,IPC ... pad in inner layer0.025mm(10mil)Min Distance from Board Edge to Inner Roundess0.25mm(10mil)Board Thickness6 layers:±0.15mm ... you interested it, send us Gerber File ,pls. PCB for USB products