... Electronics!One-stop EMS Service-- Your Reliable PCB and PCB Assembly Supplier1. PCB Assembly Specification QuantityPrototype, small-medium and high ... TinExternal TreatmentPrecise V-cut, externally pressed or milled, laser appearanceExternal Tolerance±0.05mmSolder Mask ColorBlue/White/Green/Red ... achievable, “ To be the most reliable supplier of PCB and PCBA.”Our orientation is clear, “Focus on ...