Hand made in Portland, OR, from Bullseye glass and compatible with COE 90 glasses. One Half Ounce (between 40 and 90 slices, depending on avg. diameter of batch) 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. Hand Made by Glacial Art Glass 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.