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pecifications HlDYNABOXll . Backwave Foam Appearance: Dimensions: 13.5" x 9" x 1" Black Flexivinyl Barrier (343mm x 229mm x 25mm) Color: Charcoal Gray Mass: 0.16 lb/ft2 (0.78 kg/m2) STC: 28 Density: 2.0 lb/ft3 (0.125 kg/m3) Mass: 1lb per square foot Tensile Strength: 15 psi Material Thickness: 0.09 inches Tear Strength: 1.9 Temperature Range (Resistance): Thermal Conductivity (R): -40 °F to +220 °F (-40 °C to +105 °C ) 1.9 (hr-ft2-deg.F/BTU) Chemical Resistance: Standards