Imagine the Possibilities CBS rainbow dichroic coating covers a remarkable 80% of the frit surface area, a percentage unmatched by similar products in the market. The smaller size of dichroic frit is great for use in casting and all your glass art work and projects. On clear glass frit, particles are considered a medium frit size. 1 oz. Tube measures approx. 3/8" diameter and 11-1/2" inches long. 90 COE. Premium CBS dichroic coating covers a remarkable 80% of the frit surface area Rainbow coating provides a variety of colors to create with Smaller size of dichroic frit is great for use in casting 90 COE