... .Top quality with competitive price 3.ISO,UL,RoHs,SGS Aluminum Led Board,Single Sided PCB 1.We have over 10 years ... (2mil)10Hole position deviation±0.05mm(2mil)11Outline tolerance±0.10mm(4mil)12Twist & Bent0.75%13Insulation Resistance>1012 Ω Normal14Electric strength>1 ... , Plating gold20MaterialsFR4,H-TG,Teflon,Rogers,Ceramics,Aluminium, Copper base Aluminum Led Board,Single Sided PCB