... the best service and the best quality ! KangDong Electric Technology Co.,Ltd which has been specializing in PCB/PCBA and Electronic components ... ,FR4 Halogen Free ,Rogers,HF,NELCON,TACONIC,ARLON,etcMax. finished board size:23*25mil(580mm*900mm)Min.drilled hole size:3mil ... you have any interests in our products. High-density Multilayer Printed Circuit Board