Magnesia Oxide Boards Specifications: 1) Sizes: 1,220 x 2,440/915 x ... 2) Thickness: 3 - 20mm 3) Other sizes avail Magnesia Oxide Boards, fireproof,plasterboard Specifications:1) Sizes: 1,220 x 2,440 ... /915 x 1,830mm2) Thickness: 3 - 20mm3) Other sizes available4) Edge finished: squareFeatures: 1) Fireproof and waterproof2) Incombustible: A grade, GB8624 ...