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.

Generic WireJewelry High Density/Super Duty Hard Fireclay Brick, Rated Up to 3200 Degree Fahrenheit - 2 Pack

2-Tank Thunderdome Regulator

3000°F+ High Density Fire Bricks - Canadian Forge & Farrier

Iron Dungeon Forge

3200F° Rated Hard Firecly Brick - High Density / Super Duty Size: 9 x 4.5 x 2.5 Inches Perfect for use in Kiln and Forge Building Hot Face or

WireJewelry High Density/Super Duty Hard Fireclay Brick, Rated Up to 3200 Degree Fahrenheit - 2 Pack

What's the different uses of high alumina bricks? - Quora

Vermiculite Material Fire Bricks - Can withstand high temperature of 2200F, has strong thermal insulation performance, help you save woods and money.

Fire Bricks, Woodstove Firebricks, Size 9″ x 4-1/2″ x 2-1/2″, 6-Pack, Insulating Fire Bricks, Thick Firebricks Replacement for Wood Stoves

RUTLAND Fire Bricks are perfect for residential-use. Build new fireplaces or to replace old or broken bricks in existing fixtures (wood or coal

Fire Bricks

US Stove Single Firebrick for Stoves, 4-1/2 in. x 9 in. x 1-1/4 in., Tolerates Up to 2,000 Degrees Fahrenheit at Tractor Supply Co.