Manufactured Aggregates are used as base material in landscapes, a stable foundation for roads and driveways, and drainage applications in leech fields and french drains. Fractured rock is crushed and dry screened to a specific uniform size. Dry screening leaves up to 20% fines in the rock. Color and tones vary from blue-grey to tan as the veins of bedrock are mined. We carry 3 primary sizes of MA, 1/2″, 3/4″, and 1″.