LARGE diffraction grating 20g/mm

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Wah
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LARGE diffraction grating 20g/mm

Post by Wah » Fri May 15, 2020 3:13 am

Two pieces of LARGE diffraction grating 20g/mm, about 10x10cm, with transparent protection covers.
Not sure how to use them, I guess they are Echelle gratings.
$50/piece + shipping
Sold as is.

Thank you all!
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