... PCB, 1.6MM2) Strict quality control3) Prompt delivery.3) Samples are available. ServiceQuotation in 2 hoursQuick and economic delivery termFR4 ... (550x640mm)Impedance control: ±10%Surface finish: OSP, HAL, HAL lead free, electronic gold, ENIG, gold finger, immersion silver, immersion tin, thick gold ... : FR4 (Shengyi, KB, Intl.); High TG (TG150, TG170), Halogen free, Alum. ( ) Cu, Iron, ceramic base