3000 Degree Fire Brick, A super duty fireclay brick, 2 1/2 x 4 1/2 x 9

Hard Fire Brick for many uses in forges, foundries and industrial furnaces.

Fire brick - Wikipedia

2800°F IFB Insulating Fire Bricks - 9 x 4.5 x 2.5 (boxes of 12 or sin - Canadian Forge & Farrier

Hard Fire Brick for many uses in forges, foundries and industrial furnaces.

3000 Degree Fire Brick, A super duty fireclay brick

Lynn Manufacturing Insulating Fire Brick, Heat Insulation Block, Low Thermal Conductivity, 2.5 x 4.5 x 9, Pack of 4, 3000F-Rated, for Kilns

Forges

Do I need to cook moisture out of my new firebricks? I made them by pouring the refractory cement into a brick mold. - Quora

Bladesmithing Supplies

Hard Fire Bricks (High Density / Super Duty) - Foundry Service & Supplies, Inc.

9-in x 4.5-in Fire brick Yellow Clay Brick in the Brick & Fire Brick department at

The main ingredient in these Hy-C Medium-Duty Fire Bricks is fireclay, which contains mostly alumina and silica, elements capable of withstanding high

Hy-C Medium-Duty Fire Bricks, 9 in. x 4-1/2 x 1-1/4 in., 3-Pack

Smith-Sharpe Fire Brick Supply - Pizza and Bread Oven Materials