... / 603/1213mm or 300x300mm or 300x600mmThickness of Mineral Fiber Board: 6.8mm,7mm,7.5mm,8mm,9mm,10mm,12mm,14mm,15mm,18mm, 19mm, 20mm ... or 603x603mm / 603/1213mm or 300x300mm or 300x600mm Thickness:6.8mm,7mm,7.5mm,8mm,9mm,10mm,12mm,14mm,15mm,18mm, 19mm, 20mm Density ...