Try a Little - Top Quality Glass Frit in Small, Convenient Bottles Bullseye frits are made from crushed, screened and magnetically cleaned Bullseye Fusible sheet glass. Use glass frit for your pate de verre and glass casting projects, or add pizazz to your fusing and kiln-formed glass jewelry. 5 oz jars. Tested compatible 90 COE. Glass is opaque. Color may become more saturated during firing. Approximate post fire color can be seen in additional images. Also see additional images for an example of the product's packaging as well as an example of Bullseye fine frit before and after firing.