Grooved Bottom Brick Vcella TL60 18 X 9 X 3) (5 grooves)

Grooved Bottom Brick Vcella TL60 18 X 9 X 3) (5 grooves)

Large IFB with 3 element grooves for Top. Sold by the single brick, 4 top & 4 bottom brick per furnace (bottom 5 grooves).