New Orleans Gumbo Bowl - Fusible Glass Slumping Mold Mold measures approx. 7" Dia. x 2" H. To use, simply pretreat the mold with kiln wash or nitride spray, and slump your prefused or sheet glass (cut to size) using a slumping kiln schedule. For best results, always elevate this mold off the kiln shelf by at least 1" before firing. Comes with a complete New Hampshire Craftworks slumping and care schedule included!