The modified compaction mold is 4.584 inches tall with an interior diameter of 6 inches. It has a mold volume of 1/13.33 cu. ft. and a steel base plate that is 8” x 8” x 1/2″ thick. The mold has a detachable collar and is made of cold-rolled steel tubing that is plated for rust resistance. ASTM D698, D1557: AASHTO T99, T180