OUTER DIAMETER: 15.00mm +/- 0.05mm
INNER DIAMETER: 11.00mm +/- 0.10mm
CONCENTRICITY: OD TO ID WITHIN 0.05mm.
THICKNESS: 0.50mm +/- 0.05mm
PARALLELISM: 0.025mm MAXIMUM T.I.R.
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 4 PLACES.
SURFACE FINISH: ALL SURFACES FINE GROUND.
MATERIAL TYPE/QUALITY: SAPPHIRE, NON-OPTICAL GRADE
CRYSTALLOGRAPHIC ORIENTATION: RANDOM.