Blue Sof Shoe shims are .020 in. thick, compress to .0175 in. and absorb up to .010 in. of angularity. Can be used on motors, pumps, generators, turbines and other plant machinery in minutes. Made from a proprietary elastomer which has a unique cold flow and set characteristic to fill irregular gaps. Sof Shoe Shims cures angular soft foot and extends bearing and motor life. Yellow Sof Shoe shims are .045 in. thick, compress to .040 in. and absorb up to .020 of angularity.