High TG for air condition controller printed circuit board heavy copper PCB board Specification: ... ,SGS,ULLayer12-26Material typeFR-4, CEM-1, CEM-3, High TG, FR4 Halogen Free, RogersBoard thickness0.21mm to 7.0mmCopper thickness0 ... 24 layers2Material type:FR-4, CEM-1, CEM-3, High TG, FR4 Halogen Free, Rogers3Board thickness:0.20mm to 3.4mm4Copper ...