| Material | BK7 Grade A UV Grade Fused Silica |
| Dimension Tolerance | +0.0/-0.2mm |
| Thickness Tolerance | ±0.2mm |
| Clear Aperture | >90% |
| Parallelism | <10 arc seconds |
| Surface Quality | 20/10 |
| Wavefront Distortion | <λ/10@633nm |
| Chamfer | Protected <0.5mmx45deg |
| Coating | None |
| Damage Threshold | >20J/cm2, 20ns, 20Hz, @1064nm |
| Standard | |||
| Part No. | Material | ø(mm) | T(mm) |
| BWD6T2 | N-BK7 | 6.0 | 2.0 |
| BWD8T2 | N-BK7 | 8.0 | 2.0 |
| BWD10T2 | N-BK7 | 10.0 | 2.0 |
| BWD12.7T2 | N-BK7 | 12.7 | 2.0 |
| BWD16T2 | N-BK7 | 16.0 | 2.0 |
| BWD20T2 | N-BK7 | 20.0 | 2.0 |
| BWD25.4T2 | N-BK7 | 25.0 | 2.0 |
| FBWD6T2 | UVFS | 6.0 | 2.0 |
| FBWD8T2 | UVFS | 8.0 | 2.0 |
| FBWD10T2 | UVFS | 10.0 | 2.0 |
| FBWD12.7T2 | UVFS | 12.7 | 2.0 |
| FBWD16T2 | UVFS | 16.0 | 2.0 |
| FBWD20T2 | UVFS | 20.0 | 2.0 |
| FBWD25.4T2 | UVFS | 25.0 | 2.0 |
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