... specific instructionMaterial:FR-4Layer: 2 layersSurface finish, HASL lead freeSolder mask: GreenSilk screen: WhiteThe othere surface finish we could do are ... , ENIG, HAL, Gold plating, Chemical silver, etc.The other solder mask type we could do are: Red, yellow, white, black, purplePCBA ... over the worldwithin 10-20days PCBA For Digital Electrical Meter Device