... Surface finish: HASL CE, UL, ROHS approved Specifications: 1) Double layer PCB, 1.6MM2) Strict quality control3) Prompt delivery. ... ServiceQuotation in 2 hoursQuick and economic delivery termFR4 Double-sided and Alum single-sided sample in 24 hours4 layer sample in 72 ... -4 mil (0.076-0.10mm)Max. board size: single, double sided 22'' x43'' (550x1100mm) multilayer 22'' x25'' (550x640mm)Impedance control: ...