By adding a wedge, it can be used as Percision Penta Prism.
It is often used in Plumb Level, Surveying, Alignment, Range finding and Optical Tooling
| Specifications |
 Material: BK7 Grade A optical glass |
| Dimension Tolerance: +/-0.25mm |
| 90 Deviation Tolerance: |
| Precision series: up to 2 arc seconds |
Flatness: Precision series:  /4 at 632.8 nm |
| Reflectivity: R > 95% per face from 630 to 680 nm |
| Surface Quality: 60-40 scratch and dig |
| Protective Bevel available |
All measurements in mm
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