Tune-A-Flex Element
MELBOURNE, Fla., Jan. 7, 2011 — The Tune-a-Flex element from Elk Industries LLC acts as a color filter. It looks like an ordinary piece of glass, but, when held up to a light and looked through, it will "filter" light into a red color. When the plate is tilted, from one angle to...
Elk Industries, R-K Manufacturing