Features and Benefits: * High-quality vinyl-face with 6 vac holes * Weight-mated for perfect balance * High quality premium urethane construction * Fiberglass-backing is 100% inspected insuring the finest pad * Top-washer held to .0015" flatness--important for balance This highly-engineered pad is the finest available. The highest quality urethane and vinyl is used. The weight and durometer (hardness level) is highly-controlled. This insures vibration levels are at their state-of-the-art lowest. This is truly a premium pad.