1.SMT PCBA OEM Manufacturer 2.High quality and best service 3.Competitive price 4.Fast delivery time PCBA for HD(hard disk) reader mainly used in toys,charges,power supplys and other electronic products.PCBA specific instructionMaterial:FR-4Layer: 2 layersSurface finish, HAL lead freeSolder mask: GreenSilk screen: WhiteThe othere surface finish we could do are; Gold finger, OSP, ENIG, HAL, Gold ...