Looks like the standard plastic sets we've seen for decades. Could be solid plastic, could be weighted.
Check out the USCF site or any number of others for such a set.
A recommended buy for a thrifty, durable, and practical set. Everyone should have one on hand.
Could anyone tell me which chess pieces were used in this scene from Searching for Bobby Fischer?
http://www.youtube.com/watch?v=nDZSqnzXQJc