1.4L computer PCB; 2.good quality,reasonable price; 3.quicker delivery; 4. ... inside the hole on both side Solder Mask Thickness0.7mil,raised H≤0.05Colour green,blue,red,yellow,black,white(LPI ... ) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! Multilayer computer PCB board