... 4. UL, RoHS, SGS Double Sided PCB For OEM ServiceShenzhen Yuzhixiang Electronics Co., Ltd, also ... Layer No.1 - 30 LayersBoard thickness0.0075"(0.2mm)-0.125"(3.2mm) Board Thickness Tolerance±10%Copper thickness0.5OZ - ... 0.5umPanel Outline Tol (+/-)±0.004''(±0.1mm)Beveling30°45°V-cut15° 30° 45° 60°Surface finishHAL, HASL Lead Free, Immersion gold, Gold plating, Gold finger, immersion silver, immersion ...