... tried order acceptable 3.Nice after-sale service Electric SMT PCBA, OEM servicePCBA specific instructionMaterial:FR-4Layer: 2 ... screen: WhiteThe othere surface finish we could do are; Gold finger, OSP, ENIG, HAL, Gold plating, Chemical silver, etc ... Red, yellow, white, black, purplePCBA&SMT PCB&PCB SMT&electronic assembly&pcb electronicProcessing:uses the SMT non-lead craft, meets the international ...