The W1202-JGS2 304.8 mm dia × 38.1 mm thick glass wafer is a precision optical blank made from JGS2 borosilicate glass, offering exceptional dimensional stability and surface quality for demanding optical, research, and industrial applications. With a large 304.8 mm diameter and substantial thickness, this wafer provides a robust substrate for fabrication, metrology, interferometry, or custom optical components where uniformity and material performance are critical.