Isolate It!: Sorbothane Acoustic & Vibration Damping Film 70 Duro (0.04 x 4 x 6in) High Performance Ultra-Soft Polyurethane Exception Acoustic Energy Insulation Ultra Thin Film Fits Many Different Applications 0.04" of Sorbothane Will Absorb up to 4 dB Thickness Tolerance: +/- 0.007" Durometer: 70 Shore OO