... , waterproof, fast construction speed, . Durable and beautiful. The board has different kinds such as splicing type. Inserting, hiding type ... bottom layer: Uses many kinds of metal sheets B) Middle: EPS board, PU board, rock wool 2) Width: 950mm, 1000mm, 1150mm. ... 1200mm3) Thickness of middle material: 40mm, 50mm, 60mm, 75mm, 80mm, 100mm, ...