... :FR-4Board finished thickness:1.6mmSurface finish/treatment:HASL lead free Certification:RoHS compliance Solder marsk:greenMin.Min.drilled hole size ... )Material:FR-4,CEM-1,CEM-3,High TG,FR4 Halogen Free ,Rogers,HF,NELCON,TACONIC,ARLON,etc4)Surface finish/treatment: HASL ... /HASL lead free,HAL,Chemical Gold/tin,Immersion Silver/Gold/Tin,OSP,Gold ...