ADVANCER® shelves are a nearly handmade product. Composed of an advanced nitride-bonded silicon carbide formula, each shelf is slip cast in a series of custom molds with all corners and edges rounded to produce smooth surfaces for ease of handling. ADVANCER® shelves are dried slowly and carefully to remain flat. Once the shelves are dry, they are fired not once but twice in excess of 2500° F. All other shelves whether cordierite or conventional silicon carbide, are ram pressed and single fired. Unlike cordierite shelves ADVANCER® will not warp and at only 5/16” thick, they allow for more stacking space and reduced energy costs.