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Roundels and cover glass are available in clear and colored glass, flat and convex shapes
in a wide range of sizes. These lenses are typically made from durable borosilicate glass
and heat strengthening (treating) is available for added durability. Roundels and Cover glass can also be made from Technical Filter Glass, Night Vision (NVIS), covert, and other glass formulations.
Roundels and cover glass are typically used in the following markets:
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