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Factory Custom High Transmittance Dia20mm Optical 365NM Bandpass UV Filter Glass Discs ZWB2 For Flashlight
| Property | Specification |
| Type | ZWB2 UG1 U-360 |
| Thickness | 0.21mm-50mm |
| Size tolerance | +-0.02mm |
| Edge Finish | Ground and beveled |
| Surface Quality | 60-40 scratch-dig |
| Surface Flatness | λ/4 @ 633 nm |
| Parallelism | ≤3 arc min (≤0.9 mrad) |
| Transmistance | >85% |
| Clear Aperture | >90% of central diameter |



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