Wissmach COE 96 Black Opal Frit is made from Wissmach COE 96 Fusible sheet glass that has been crushed, screen and cleaned. Frit provides versatile design possibilities for adding embellishment on fused projects, and is a must for kiln-casting, kiln-forming and pate-de-verre techniques. We sell a variety of opalescent and transparent colors in medium grits in 1 lb. jars.