Product Overview DEI Decoupling Washers (Vibration Barrier)Verified Details They are made from viscoelastic elastomers designed to act as a barrier between metals and dissipate vibrational energy, resonance and impact. Simply add washer between the metal surfaces. Perfect for mounting fuel tanks on motorcycles, body mounts, fender mounts and more. Features Color: Clear to slight yellow Operating Temp: -20F to 200F Thickness: .050” +/- 10% Tensile: 2400 Part Number Size 36 Washers (4) 13.48mm ID x 63.50mm OD (8) 15.24mm ID x 29.51mm OD (8) 10.31mm ID x 20.63mm OD Part number: DEI-50087 Part number: DEI-50089