Prepackaged Pad-Pak provides proper leveling and loading for free-standing machines having 4 points of support. Pads come in 45 durometer neoprene for low frequency applications, and 70 durometer nitrile for high damping. Each set contains 4 base pads and 4 shim leveling pads. Cross patterns on tops and bottoms assure stable nonslip surface. Sizes range from 2-10 in. sq, in varying thickness, to support machines up to 20,000 lb.