Does a distributor Rotor come with the Distributor?

I'm buying a new Distributor. And i'm just doing my research to see if i'm getting all the parts i need. Here is the part i'm buying. http://www.ebay.com/...1153450035 Now i know next to nothing about cars. But i know by getting this Distributor i will be getting a whole new Distributor cap with it. But i don't know if the rotor is something that comes inside with said Distributor or if i will have to but it separately. Could anyone let me know if those pieces come together? Thank you!

Added (1). I won't be putting it in myself. I just need to know if i will have all the parts needed is all. Or if i will have to buy the rotor separately

If you know next to nothing get someone to set it up for you as you can damage the engine if the timing is too far out.

That comes with everything. The black end is where the plug wires goes into. And the other end with the slot bolts up against the cam shaft.