Feature(may vary by option.)

●Country of Origin: CN(original)
●Usage: Optical
●Material: Glass
●Blue Color
●Surface Quality: 60/40

[58mm 2mm]

[49mm 2mm]

Description

Surface quality: 0/0, 40/20-80/50
2 Surface Accuracy: 1/10 inch, 1/4 to 2
3. Thickness tolerance: ±0.01 mm to ±0.02 mm
4. Parallel: 5 ARC second to 1 ARC minute
5. Processing range: 0.2mm thickness at the thinnest thickness
6. Coating
7. Steel up to 0.2mm thick.