... and FPC board 4. UL, RoHS, SGS Double Sided PCB For OEM ServiceShenzhen Yuzhixiang Electronics Co., Ltd, also named Sunsoar Precision ... 2) Clear pictures of pcb/ fpc/ pcba or pcba sample for us3) The PCB specification: base material, board thickness, copper ... immersion thickness, and any other special requirements.4) Test method for PCB/PCBA Delivery Time for Hi-frequency PCB1) Sample within 6 days ...