Double layers PCB: Material: FR-4 Thickness: 1.6mm Surface finish: HASL CE, UL, ROHS approved Specifications:1) Double layer PCB, 1.6MM2) Strict ... .10mm)Max. board size: single, double sided 22'' x43'' (550x1100mm) multilayer 22'' x25'' (550x640mm)Impedance control: ±10%Surface finish: OSP, HAL ... , TG170), Halogen free, Alum. ( ) Cu, Iron, ceramic base Double sided PCB / multilayer PCB