... Product Description pcb board 1. Layers: 1-22 layers 2. Material: CME1, CME3, FR4, High TG FR4, Halogen-free FR4, Aluminium, ... (35N, 85N), etc. 3. Max. Size: 1200mm*2000mm 4. Board Thickness: 0.125mm-6.00mm 5. Min. Trace Space: 0 ... (17µ M-175µ M) 8. Surface Finishing: HASL, Lead free HASL, ENIG, Immersion Tin, Immersion Silver, Immersion gold, OSP, ... and MIL-STD-105D China GB(4588)pcb board 01-18-0950