Interlocking lead bricks are used in radiation shielding applications to provide protection from radiation. The bricks are easy to erect and assemble. Medi-RayTM developed a revolutionary interlocking design for lead bricks. Contact Medi-RayTM for high quality interlocking bricks at 877-898-3003 or fax at 914-337-4620. Email at [email protected]. Visit our site at http://www.mediray.com/