... .5mm 3. Min. hole size: 0.5mm 4. ROHS Street led lamp board:AL,copper thickness:2oz, 2 Layer board,board thicknesses ... .3mm, Our Production Capability for PCBLayer: 1 to 28 layersMaterial type: FR-4, CEM-1, CEM-3, High TG, FR4 Halogen ... services providedCertificate: ROHS, UL, ISO9001-2000, ISO14001Factory direct price Street LED Lamp Board