Noise Reduction Partition Panel Width 4 ft Thickness 1 in Color Gray Noise Reduction Coefficient (NRC) 0.85 Material Fiberglass Temp Range 180 Degrees F (continuous) +265 Degrees F intermittent Resistant To Grease Mildew Oil Coverage Reduces up to 12 dBa Standards ASTM E84-Class A Fire Rating Includes 1-Panel Curved Track Connectors Rollers