| Parameter | Specification | 
| Material | Glass, quartz, etc. | 
| Shape | Round | 
| Outer diameter | 3”——12” | 
| Outer diameter size | 76.2mm——300mm | 
| Outer diameter tolerance | ±0.05mm | 
| Thickness | 0.1mm——2.0mm | 
| Minimum thickness | 0.1mm | 
| TTV | <3μm | 
| BOW | <20μm | 
| WARP | <30μm | 
| Appearance quality | 20/10 | 
| Roughness | Ra<5nm | 
| Inverted edge | 45°,C0.2+/-0.1mm | 
| * Remarks: Can be customized according to customer needs | |

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