ceiling board----mineral fiber board 595*595 15mm jinzhou packing: ... pattern:3510,711,hole,.etc ceiling board------mineral fiber board 595*595 15mm jinzhouSpecification:1.Low density ... T5.density:240-280kgs/m36.light reflectance:≥0.857.special design: size:595*595mm,600*600mm,603*603mmThickness ... :12mm,14mm,15mm,16mm,18mmMineral Fiber concentration:85%Density:280-320kg/m3 or 380 ...