Acoustic Partition; Width 48 in; Length 50 ft; Thickness 1 in; Color Gray; Noise Reduction Coefficient (NRC) 0.65; Material Fiberglass; Temp. Range 160 Degrees F Continuous + 265 Degrees F Intermittent; Resistant To Alkalis; Dirt; Dust; Grease; Mild Acids; Moisture; Oils; Coverage Reduces Up to 35 dBa; Standards ASTM E-84; Includes Double Layer Aluminum Vinyl Coated