... 1:2008 4.Hot sales environment-friendly lead free HASL PCB Hot sales environment-friendly lead free HASL PCBOur company's website:www.dachengxing ... )8Surface finish/treatmentChemical tin,Chemical gold,Immersion gold,Osp,Gold plating9Copper thickness1-4.0oz10Solder mask colorgreen,black,white,red,blue,yellow11Inner packingVacuum ...