The W1218-CCZ 106 mm × 77 mm × 10 mm thick ellipse is a precision-manufactured low-expansion Clearceram-Z optical blank ideal for high-stability optical and engineering applications. Made from CCZ (Clearceram-Z) material, this elliptical substrate offers excellent dimensional stability, low thermal expansion, and smooth surface quality, making it well-suited for precision optics, metrology targets, and environments where thermal and mechanical consistency are critical.