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These protective light houses are used in laser levelling devices and other applications where protection from ambient influences are required (water, dust, etc.). The planed edges allow sealing with O-rings or gaskets for a watertight seal. The windows are precision manufactured for an absolute minimum in unwanted beam deflection. These items are not stocked and will be manufactured on customer request only. | Specification limits: | | 
| | Flatness: | l/10 | | Parallelism: | 5" |
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