Made from Bullseye glass and compatible with COE 90 glasses. One half ounce. Murrine diameter varies between 3mm and 10mm. Fuse-Flat Slices: These slices are cut and selected especially for artists who use a kiln to form their glass. One half ounce is between 40 and 90 slices, depending on the diameter of the murrini. There will generally be a lot of variability in the diameter of slices.