... / Double-sided:0.2mm ±0.1mm4-layer:0.4mm ±0.1mm6-layer:0.6mm ±0.1mm8-Layer:1.0mm ±0.1mm10-layer:1.0mm ±0.12mm12-layer:1 ... ,HASL pb free,immersion gold,immersion silver,immersion tin,O.S.P (Entek),S/G plating,ENEPIG,G/F plating,carbon…Blind ... and then set out to surpass them. 2 Layer Immersion Gold PCB With Gold Finger