Hardboard: Face and back: Face smooth and back rough. Type: Standard, waterproof hardboard, hardboard with glue. Product Name: Hardboard Material: Poplar, pine or hardwood combi. Grade: A/B/C. Color: Light and dark. Face and back: Face smooth and back rough. Type: Standard, waterproof hardboard, hardboard with glue. Density: 900KGS/M3 and up. Size: 1220X2440. Thickness: 2.5-6.0MM hardboard