1.1L PCB; 2.good quality,reasonable price; 3.quicker delivery; 4.better logistic service; 5.UL,SGS,ROHS, ... layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm(tolerance)Copper Thickness1/2OZ-3OZ (35um to 105um ... .,UL 94 V0 approved) Surface Finish HALtin height≤0.05mmENIGNickel 3-7um,gold:0.5-0.7umOSP/flash gold 0.2 ...