DIAMETER: 1.000″+.000″/-.005″
THICKNESS: 0.250″+/-.002″
PARALLELISM: 3 ARC MINUTES MAXIMUM.
FLATNESS: 5 WAVES MAXIMUM @ 633nm, 2 FACES.
SURFACE FINISH: 60-40 PER MIL-PRF-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: c-PLANE