Save time and minimize glass waste with Fuseworks Fusible Shapes. Made with Fuseworks 90 COE glass, these 1" precut round shapes are perfect for all types of fusing projects. Specifically designed and tested for use in the Fuseworks Microwave Kiln. TO USE: Remove the lid from kiln and layer glass shapes on kiln paper inside kiln. Embellish with glass frit, stringer, milliefiori or confetti and fuse following kiln manufacturer’s instructions.