... 1,OEM offered 2,Good quality and good price. 3,Certificates: UL, ISO,SGS 4,PCB manufacturer 5, ... -1, CEM-1, CEM-3, FR-4 Halogen Free, Aluminium ect.Layer1-32Board Thickness0.4mm-3.2mmCopper Thickness0.5oz, 1.0oz ... width/space4/4mil(0.1/0.1mm)Surface FinishHASL, Lead free HASL, OSP, Gold-plating, Chemical silver, Chemical gold ... or Western union high quality single layers lead free HASL pcb for electronic