Manufacturer, customer made, good quality, competitive price Silicone Rubber SealsSurface: Double Fabric ImpressionMaterial: Foamed silicone rubberHardness: 20±2 Shore ATemperature Range: -60-250 oCElongation: 250%Density: 0.90g/ccColor: blackDiameter: 80mm Typical Applications: Fireblocks, thermal barriers, noise and vibration dampeners, instrumentation and high performance gaskets and seals.