K23 soft firebricks are commonly used as the primary insulator in electric pottery and glass kilns, raku kilns, and farrier forges.

Plain bricks are 4.5” x 9”, and available either 2.5” or 3” thick.

2.5” bricks are available individually, or by the carton of 12 pieces.

3” bricks are available individually, or by the carton of 10 pieces.

Note: Cut and grooved bricks are available as replacement parts for Cone Art Kilns only, and will not fit other brands of kilns. *Model and location will need to specified for these bricks before the order can be processed.