ODAMP VIBRATION DAMPENER
Made popular by Pete Sampras. The centre hole minimises resistance to air when the racket is swung.
The ODamp Vibration Dampener is a favourite choice to most, and to some is actually considered the only dampener worth using.
Simply apply the Vibration Dampener to the strings by fitting it between the two centre vertical strings, and then push it up into the first horizontal string. This maximises the amount of vibration the dampener reduces.
Less Vibration sent down the arm, means less vibration sent through your muscles and tendons, leading up towards your elbow. In effect reducing the chance of you getting Tennis Elbow.