Al material base circuit board Typical feature . Standard dimension: 490x8857; 490mm 600x8857; 500mm (optional dimension for discussion) . Standard thickness: 1.0, 1.5, 2.0, 3.0 mm(optional dimension for discussion) . Copper foil thickness: 35um, 70um, 105um, 140um, 210um . Heat conduction and insulating layer thickness: 60um Application Motor, auto-bicycle trigger, voltage adjustor Audio output magnifier Power supply, solid transistor base Industrial power Solar-energy batter base, heat sinker etc. Standard export carton