Isolate It!: Sorbothane Acoustic and Vibration Thin Film Square with 3M Adhesive (0.040 x 7 x 7") 40 Duro - 1 Sheet High Performance Ultra-Soft Polyurethane Exception Acoustic Energy Insulation Ultra Thin Film Fits Many Different Applications 0.10" of Sorbothane Will Absorb up to 10 dB Thickness Tolerance: +/- 0.007" Durometer: 40 Shore OO