The Duke Company carries Quikrete 5000 concrete mix in 60 pound bags, 80 pound bags and pallets.  This concrete mix is comprised of a blend of commercial grade stone / gravel, sand / cement, and is specifically created for high, early strength.  Quikrete forms to 5,000 pounds per square inch (PSI) after 28 days.  Quikrete is ideal for footings, patios and concrete projects that are 2 inches or more in thickness and require higher strength.