... proffing 2sample free 3Moisture-Proof,Mould-Proof 4Soundproof,Waterproof acoustic boards: mineral fiber board , fiber cement board , gypsum board , calcium ... , 618*1243mm, or according to orderThickness: 4-22mmPattern:printing series,relief series, spray series, perforation series etc Features: 1) non-absorbent, fire retardant and ...