... 270*280mmSurface finishing :HASL,LFHASL,HAL,Chemical Tin,Chemical Gold,Immersion Sliver/Gold,OSP,Gold PlatingSolder mask color:white ,black,yellow,red,green ... ,Foshan,Shangrao and ji'an to produce high pricise circuit boards in varieties ,such as single/double sided board ... ceramic boards ;Nowadays , ZXH has become a large scale PCB manufacturer in China .ZXH headquarters in Longgang District of ...