What Is Inside Wifi Antenna?

Today, I was working on my quad and I was so curious to know why this is so heavy. I was going to put one on my quad but it was to heavy and it was causing troubles in balancing. So I tried to open it and see what is inside. Well, I was not so successful, because I broke it. Anyway I was so happy from the result. Just look at the picture and you will know why.

Yes, just a very thin and light hard wire. The reason I am using this huge antenna is because my Xbee needs it for longer range.