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 coarse glass frit for your glass casting or frit painting projects, or add pizazz to your fusing and kiln-formed glass jewelry. Packaged in a wide-mouth 5 ounce bottle. It provides you with plenty of frit to last for a number of projects, but not so much that you waste space in your studio. They are convenient if you ever need to take your fusing supplies with you on the road. Fully compatible 90 COE.