... .Small tried order acceptable 3.Nice after-sale service Electric SMT PCBA, OEM servicePCBA specific instructionMaterial:FR-4Layer: 2 layersSurface finish, HASL ... more days for trial order)ItemDescriptionspcba servicePCBA OEM&ODMkinds of pcba manufacturedPCBA service: medical, instrument, environmental, industrial, networking, automotive, aeronautics, security ...