This is the brick we use for our annealing, pick up, and color ovens. The HS (high strength) version of this brick makes for an oven that will take a beating and age well. Maximum temperature is 2300 degrees Fahrenheit. Not recommended for gloryholes.
Box of 12: $53.46
2-1/2 Straight = 2-1/2" x 4-1/2" x 9"