... PCB, SMT, Package, deliv Golden finger pcb board description:layer:6material:FR4Board thickness: 1.6mmSurface finish ... soldermask 10um 12Soldermask Green,Yellow,Black,Blue,White,Red,transparent photosensitive,,soldermask,Strippable soldermask13Minimum linewidth ... rigid board,flex board,rigid-flex board,Blind via board,bured via board,single board,double-sided board,multi-layer board.Hasl board, ...