1.Building automation system PCB; 2.good quality,reasonable price; 3.quicker ... 2OZ-3OZ (35um to 105um),+/-8um(tolerance),purity 99.5%Impedance Control±10%Bow and Twist MAX.0.75 ... Finish HALtin height≤0.05mmENIGNickel 3-7um,gold:0.5-0.7umOSP/flash gold 0.2-0.5umPealable maskcover ... for the first time,+/-2%(tolerance) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! Building automation system PCB