Pre-Cut Fusible Glass Shapes and NHC Studio Gripper Set, 1-Inch Square, Bullseye Glass Thin Crystal Clear Transparent, 90 COE, 12-Pack This listing contains 12 Pre-Cut Fusible Glass Shapes, 1-Inch Square, Thin (2mm) Crystal Clear Transparent, 90 COE made from Bullseye Glass and our famous 5.75" Studio Gripper. Tekta Glass is economical, lead-free, and Crystal Clear! Great for fusing jewelry pieces. Fantastic for mini or microwave kilns. We've done the hard work for you. Just piece and fuse at full fuse temperature. These peices are each cut by hand, not by machine. For that reason, some pieces might have slightly imperfect edges. These imperfections are perfectly normal and will smooth out completely during the fusing process.