Specification: Number of Layer: 1,2,4 or 6,upto 18 layerBoard Shape: Retangular,round,slots,cutouts,complex,irregular Board Type: Rigid, Flexible, Rigid-flexible Board Material: FR-4 glass epoxy, FR-4 high Tg, Rohs compliant, Aluminum, Rogers,etc Board CuttingShear: V-score,Tab-routed Board Thickness: 0.2-4.0mm, Flex 0.01-0.25mm Copper Weight: 1.0, 1.5, 2.0 oz Solder Mask: Double-sided green LPI,A lso support Red, White, Yellow, Blue, Black Silk Screen: Double-sided or single-sided in white, yellow, black, or negative Silk Screen Min Line Width: 0.006'' or 0.15mm Max Board Dimensions: 20 inch*20inch or 500mm*500mm Min Trace/Gap: 0.10mm, or 4mils Min Drill Hole Diameter: 0.01'',0.25mm, or 10mils Surface Finish: HASL,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc. Board Thickness Tolerance: ±10% Copper Weight Tolerance: ± 0.25 oz Minimal Slot Width: 0.12'', 3.0mm, or 120mils V-Score Depth: 20-25% of board thickness Quote requirement for pcb and pcb assembly: 1)Gerber file and Bom list Gerber file,PCB file,Eagle file or CAD file all acceptable 2)Clear pics of pcba or pcba sample for us This will help a lot for the fast purchasing as request 3)Test method for PCBA This can guarantee 100% good quality products when delivered