
You open one of the 998 boxes on this floor and find...
A normal looking rubber band. Testing will determine it is perfectly elastic to a distance of 10 kilometers with a spring constant of 100N/m. When it is extended past 1km in length, it also acts as monowire. Past 10km, it snaps. (Note that this takes 1MN of force, enough to lift roughly 100 metric tons).

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