This is a in pristine condition Canon 200mm f/2.0 IS USM lens.
I don't think there is really any need for me to explain what this beast of lens is. I think the name speaks for itself :-)
The lens comes with:
1. Canon Lens Case with Key/Lock
2. canon Front Leather Lens Cap E-145B
3. Canon Metal Lens Hood ET-120B
4. Canon Drop in circular polarizing filter Canon PL-C 52 ($239.95)
I think that is basically it.