Old Spectrum System 96 sheet glass for glass fusing. This is an opaque glass with beautiful color flow, from the Opal Art series. OGT continues this series, but it seems to be difficult to obtain, making this glass valuable. It can be used as regular stained glass for panel making and art projects. Color: Purple, opaque Surface: S Smooth Size: Approximately 20cm x 30cm Expansion Coefficient: 96 *The color in the photos may differ slightly from the actual product depending on your viewing environment. *Stored at home for a long period. *If you purchase two pieces (two sheets) together, we will discount 300 yen for shipping and box charges.