2” Sapphire Ingot Specification Item: 2 Inch Sapphire Ingot Primary Flat Orientation: A-plane(1120)±0.2° Orientation of C-plane Surface: C-plane(0001)±0.1° Diameter: 50.9±0.1mm Circularity: ±0.02mm Straightness: ±0.02mm Primary Flat Length: 16.0±0.5mm Bubbles: ≦15% Mark Effective Length /pc :80~240mm /pc