Material: Mineral wool tile, fleece-covered Colors: White (Standard) or Black (Special Order) â??Nominal 2â?? x 2â?? and 2â?? x 4â?? module sizes..... no field cutting required Thickness: 3/4â?? nominal Sound Reduction: 33dB, CAC 35 dB, NRC 0.80 â?¢ Reaction to fire: White finish â?¢ Class 1 (ASTM E84-97a) â?¢ Class A (ASTM E 1264) â?¢ CAN/ULC-S102 â?¢ A2-s1, d0 (EN 13501-1) Light Reflectance: Approx 87 (ISO 7724-2, ISO 7724-3) nominal Humidity Resistance: Up to 95% RH Mold Resistance: According to ASTM D3273