| Scratch-Dig | Description |
| 80-50 or 60-40 | These are the most commonly used surface quality specifications for commercial grade applications and cases where surface quality is not critical. Windows for imaging systems typically fall in this category. These provide the most cost-effective window options. |
| 40-20 | Used for precision applications where surface quality is important. This is a common specification for low to medium powered laser systems and smaller optics. There is some premium over lower surface-quality windows. |
| 20-10 or 10-5 | These specifications are used almost exclusively for high power laser systems and very high precision systems where surface quality is critical. There is typically a significant cost premium associated with these surface quality specifications. |
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