The DiversiTech MP-4E is a 4x4x7/8 in. rubber/foam rubber anti-vibration EVA pad designed to reduce vibration and noise emanating from refrigeration and air conditioning equipment. The E.V.A. (Extreme Vibration Attenuation) pad is the latest generation of vibration dampening technology and the most effective anti-vibration pad available. Its superior performance is due to the special composite polymeric foam center and it outperforms cork and rubber AV pads by greater than 3:1