Laser Warning Sign Aluminum Sign > If you're assembling one of our 'Death Rays' or working with any other high power laser, this sign will come in handy. A Class IV laser warning sign specifically intended for very high power, potentially dangerous.... more info
A must for scientists, engineers, laboratories & classrooms. This stunning and informative poster graphically portrays all known ranges of electromagnetic radiation including gamma rays, X-rays, ultraviolet light, visible light, infrared,...... more info
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