Excel-Tone MR Ceilings Daiken Excel-Tone MR Ceilings Daiken Excel-Tone MR mineral fiber acoustic ceiling tiles with sag resistance, outstanding fire resistance and thermal insulation is perfect for creating a refined atmosphere. Plain & Perforated Description Specification Material BGL / Aluminum Thickness 0.5 / 0.7 Size 600 x 600 mm System Lay In Suspension 15 mm & UDT Finish Pre-Painted & Powder Coated Perforations Plain & 1.8 mm