The W1219-CCZ 142 mm × 101 mm × 12 mm thick ellipse is a precision-cut low-expansion optical blank made from ultra-stable CLEARCERAM®-Z glass-ceramic, engineered for high-performance optical and metrology applications where thermal consistency and dimensional accuracy are critical. Designed with tight tolerances and exceptional material stability, this elliptical substrate delivers minimal thermal expansion and excellent surface quality, making it ideal for precision optical components, interferometers, and environments that demand reliable, low-drift performance.