DIAMETER: 0.331″+/-.002″
THICKNESS: 0.020″+/-.002″
PARALLELISM: 3 ARC MINUTES MAXIMUM.
FLATNESS: 10 WAVES/INCH MAXIMUM, 2 FACES.
SURFACE FINISH: 80-50 PER MIL-O-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: RANDOM.