Old Spectrum System 96 sheet glass for glass fusing. Spirit Series. OGT also carries this series, but it seems to be difficult to obtain, so this glass is valuable. It can be used as regular stained glass for panel making and art projects. The surface is smooth, flat, and smooth S. Color: Blue/White/Clear Transparent Surface: S Smooth Size: Approximately 20cm x 30cm Coefficient of Expansion: 96 *The color in the photos may differ slightly from the actual product depending on your viewing environment. *Stored for a long time at home. *If you purchase two pieces (two sheets) together, we will discount the shipping and box fee by 300 yen.