... PCBA , testing , casing and packing,)2, fast response for quotation and prototyping and shorter lead time for delivery3, professional engineering team on ... silver, etcSoldermask: green, black, blue, white, yellow, purple, and matt, etc.Legend: white, yellow, black, etc. NO Item Craft ... Capacity1 Layer 1-30 Layers 2Base Material for PCBFR4 ...