Insulating FireBrick HARD refractory 3000 9 x 4.5 X 4" X2.5 ARCH single brick

Description

Insulating FireBrick
hard
refractory  3000 degree.
9″ x 2.5″ x 4.5″ x 4″  The small end of the wedge is 4″, the wide end is 4.5″
Insulating Fire Brick 3000 degree  K-23   9 X 4.5″ X 4″ X 2.5″
KEY
IMPORTANT
,
KEY BRICKS
like for an ARCH or circle.
You can also lay them in a herringbone pattern for straight walls.