Expansion coefficient: 90 Rare, discontinued Bullseye black iridescent glass. Thickness: 2mm Please check the size in the images. Photographed in natural light. The color may appear different depending on your device. Shipping is planned via Nekopos (a Japanese delivery service). We will pack it to prevent breakage, but there is a possibility of damage upon arrival. (No replacements or compensation will be provided) We will use recycled materials for packaging, such as newspaper, cushioning material, and cardboard. Please understand and agree to the above before purchasing.