Refractory products, articles and materials not made of metal, namely, cast monolithic sections of coke walls, refractory bricks, refractory shapes, not of metal, refractory walls comprising modular interlocking bricks, refractory shapes, not of metal and refractory construction materials, not of metal

Refractory products, articles and materials, namely, cast monolithic sections of coke walls, refractory bricks, refractory shapes, not of metal, refractory walls comprising modular interlocking bricks, refractory shapes, not of metal and refractory construction materials, not of metal