Sakrete, 40 LB, Concrete Maximizer Mix, Proprietary Formula That Yields More Coverage Than Standard Cement Mixes, Specially Manufactured Aggregate Material & Higher Volume Of Cement Yields A Mix That Gives You 67% More Coverage, More Cement Also Means A More Uniform & Easier To Mix Blend, Outstanding Strength Of 5500 PSI, UPC: 0 94138 05052 5.