1,OEM offered 2,Good quality and good price. 3,Certificates: UL, ISO,SGS 4,PCB manufacturer 5,Price :45-66usd/square meter ItemSpecificationsMaterialFR-4, FR-1, CEM-1, CEM-3, FR-4 Halogen Free, Aluminium ect.Layer1-32Board Thickness0.4mm-3.2mmCopper Thickness0.5oz, 1.0oz, 1.5oz, 2oz, 3ozMin.Drilled hole size0.2mmMin. Track width/space4/4mil(0.1/0.1mm)Surface FinishHASL, Lead free HASL, OSP, Gold- ...