Size: 20" x 24" x 1" ThickHighly versatile ceramic fiber product.  Lightweight, with low conductivities, low heat storage and excellentresistance to thermal shock.  May be used with #48500 Fiber Mold Hardener.  Can be shaped for use as a slumping mold or use to anneal beads.  Larger beads may require kiln annealing.- Max temp. rating: 2400oF