Normal Hardboard, gule added hardboard 2.5mm,2.7mm,3.0mm,3.5mm face: smooth back: rough 1220x2440mm,1000x2000mm Hardboard, we ... ) etc. 2) Specifications: Size:1220x2440mm ,1000x2000mm Thickness: 2.0-6.0mm Color: light color, normal color, dark color Density: >=900KGS/M3 ... , Interior or auto decoration, etc Good Quality Hardboard 2.0-4.0mm