Vitcas Refractory Fire Bricks 60% AL203 (230mm x 114mm x 64mm) 9'' x 4.5'' x 3''

Alternatively, higher grades of high alumina Refractory Mortars in the Vitset range - Vitset 80 or Vitset 90, resistant up to 1860°C / 3380°F, can also be used. Fire Bricks. Low Alkali Content : Minimizes degradation, extending the lifespan of the bricks.

eBay