... -4, FR-1, CEM-1, CEM-3, FR-4 Halogen Free, Aluminium ect.Layer1-32Board Thickness0.4mm-3.2mmCopper Thickness0.5oz ... .1mm)Surface FinishHASL, Lead free HASL, OSP, Gold-plating, Chemical silver, Chemical gold(ENIG), Chemical tin, Carbon ink.Solder Mask ColorGreen, yellow, black, white, red, blueProfilingPunching ... /T ,L/C or Western union high quality single layers lead free HASL pcb for electronic