Ribbed elastomeric face sheets,alternate high and low ribs, 3 per inch, bonded to 1/2"sound/vibration absorbing pad. This combination offers the highestdegree of sound attention and vibration isolation available in apad-type mounting. Why Buy VibrationPads? Eliminates drilling floors andbolting compressors Eases installation Prolong machine life Reduces service intervals These pads are designed andconstructed with alternate rib height to offer additional vibrationisolation under both high and low weight loads. Size: 1" x 3" x 3"