Item is returnable, but does not qualify for free returns.
The Red Eye Ball Core is a ball bearing that translates harmful vibration into kinetic energy which is absorbed by the dual density body providing the maximum arm protection from a button style dampener.
One of the best dampeners I have used. The red eye is durable and absorbs most of the shock from polyester strings. It is slightly heavier than many of the other dampeners, if you are sensitive to the 0.1-0.2 ounce difference.
Does not get dislodged from strings as easily as other dampeners.
This is a high quality dampener. Will take most of the vibrations out of the string bed, particularly when using polyester strings. The only con is that it is on the larger size in comparison to other dampeners.