1.4L dvr PCB; 2.good quality,reasonable price; 3.quicker delivery; 4. ... to hole/to pad Tolerance±0.05mm/±0.2mm Solder Mask Pad no Open soldermask must cover all on both side ... Open reject soldermask inside the hole on both side Solder Mask Thickness0.7mil,raised H≤0.05Colour green,blue,red,yellow ... ) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! Multilayer dvr PCB board