Is conductive foam needed?

Hey guys, I'm getting my arduino supplies organized, I just bought a http://www.amazon.com/Akro-Mils-20-Inch-16-Inch-Hardware-Cabinet/dp/B003P2UOCO To store my ultrasonic sensors, and 7 segment displays etc. in the drawers, do I need to put the leads in conductive foam? I would have put them in the drawers but they arrived with some of the foam on.

Thanks, Stephen

You do not need foam for ultrasonic sensors or seven segment displays. You only need it for static sensitive components.