... : NO Item Craft Capacity1 Layer 1-30 Layers 2Base Material for PCBFR4, CEM-1, TACONIC, Aluminium, High Tg MaterialHigh FrequenceROGERS ,TEFLON ... (Tin-Lead Free), ENIG(Immersion Gold), Immersion Silver , Gold Plating (Flash Gold), OSP, etc.14SoldermaskGreen, White, Red, Yellow, Black, Blue, transparent ... Thickness copper21Thickness of Copper0.5-14oz (18-490um) PCB assembly for machines