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These are 18.95 each http://www.amazon.com/Xpand-Multibrand-Glasses-single-pack/dp/B00462RMS6

These are11.95 each http://www.amazon.com/XPAND-X103-P2-G1-Active-Glasses-Panasonic/dp/B006PC6U7O/ref=pd_sim_e_5/181-8781590-4781425

Is there any physical difference between the two?
Edited by Musichascolors - 10/6/13 at 10:02am