The Rubylith Redmask Film is layered on a 3 mil. clear polyester base which is the heaviest you will find for keeping out light that will affect your night vision. The Rubylith film filters out light with a 5.0 opacity. A must at Star Parties. Great for laptop displays, interior & exterior lights, flashlights, etc...Cut it, shape it anyway you like!
Rubylith sheets come 4 sheets 12" X 12" or 3 sheets 12" x 18" (great for wide screen laptops).
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