... accepted 3,High quality 4,Quality Certification fpc with pi stiffenerSpec.Layer: 1-30Board finished thickness:0.21mm- ... -4,CEM-1,CEM-3,High TG,FRS Halogen free ,RogersMin. drilled hole size: 0.25mm 0.075mmMin ... 3mil 0.075mmSurface finish/treatment(finish coattingOO) Hasl/hasl lead free ,Hal, Chemical tin, Chemical gold, immersion silver /gold ... /red/blueLead time: 3-10days Multilayer fpc with pi stiffener