This is the illuminated bar in the middle of Chell's portal gun. LEDs are positioned at either end of the acrylic rod and light it up (similar to lightsaber props) in orange or blue. The wheel-looking discs on either end were hand-cut from ABS plastic.
Copyright 2002-2015 Cosplay.com, LLC. All Rights Reserved.
All comments and posts in our forums are the opinion of the respective poster.