Blender 3D: Noob to Pro/Every Material Known to Man/Rubber

Method 1
This method is for a general, computer-performance-oriented rubber material. Color Shaders Some people think it looks TOO smooth. If you feel that way, add a very light texture: Texture Tex Type - Stucci Map Input Map To
 * Col: (Adjust as needed)
 * R - 0.15
 * G - 0.14
 * B - 0.12
 * Spec: (Change as needed)
 * R - 1
 * G - 1
 * B - 1
 * Diffuse Shader:(Minnaert)
 * Ref - 0.7
 * Dark - 0.6
 * Specular Shader:(Blinn)
 * Spec - 1.5
 * Hard - 10
 * Refr - 2
 * StucciType - Wall In
 * NoiseType - Hard Noise
 * NoiseSize - 0.05
 * Turbulance - 3F
 * Noise Basis - Voronoi F1
 * Coordinates - Orco
 * SurfaceType - Cube
 * MapType - Nor
 * NorSlider - 0.3

Method 2, w/SSS
This method is a better quality and more realistic Rubber material, but works best using SubSurface Scattering, so it may affect the time of your Render. Color Shaders SSS Some people think it looks TOO smooth. If you feel that way, add a very light texture: Texture Tex Type - Stucci Map Input Map To
 * Col: (Adjust as needed)
 * R - 0.15
 * G - 0.14
 * B - 0.12
 * Spec: (Change as needed)
 * R - 1
 * G - 1
 * B - 1
 * Diffuse Shader:(Lambert)
 * Ref - 0.8
 * Specular Shader:(CookTorr)
 * Spec - 0.97
 * Hard - 5
 * Scale - 1
 * RadiusR - 8.5
 * RadiusG - 5.5
 * RadiusB - 4
 * Hex - DFDFDF
 * Col - 1
 * Tex - 0
 * Front - 1
 * Back - 1
 * IOR - 1.8
 * StucciType - Wall In
 * NoiseType - Hard Noise
 * NoiseSize - 0.05
 * Turbulance - 3F
 * Noise Basis - Voronoi F1
 * Coordinates - Orco
 * SurfaceType - Cube
 * MapType - Nor
 * NorSlider - 0.3

Rubber