The W1258-D263-T eco 25 mm dia × 0.994 mm thick glass wafer is precision-manufactured from SCHOTT D 263® T eco thin borosilicate glass, known for its high optical precision, excellent chemical resistance, and eco-friendly production. Featuring a smooth, fire-polished surface and tight thickness tolerances, this lightweight 25 mm diameter substrate is ideal for demanding imaging, sensor covers, optical coatings, and micro-optics applications where consistent optical performance and material stability are essential.