... .008”(0.4mm ±0.1mm) Bow and twist < 7/1000 Copper Weight Outer Cu weight 0.5oz ~ 3.0oz Inner Cu ... -shape Surface Finish HASL,HASL pb free,immersion gold,immersion silver,immersion tin,O.S.P (Entek),S/G plating,ENEPIG ... pcb,kindly contact me for more details! 1.6MM thickness copper clad Single Side PCB Boards