This heat-resistant work surface is made from a soft but rigid insulation material and is a perfect for use when copper foiling. Ideal for cutting and assembling stained glass projects, it features ample space for small stained glass projects with room to spread out tools and equipment.Details:Brown12" x 12" x 1/2"Soft but rigid - accepts thumbtacksHeat resistantInsulation materialFor cutting and assembling stained glass projects