Liz
You would be better off posting some pics of it so some of us on here can ID it for you.
If it is indeed an Eastern king, you dont want it, bad snakes, better off just sending it my way!!
Just kidding!
If it is an Eastern, then it will get bigger than a cal king, therefore it will have a bigger housing requirement. And eat larger prey items.
If you bought it as a cal king, and it turns out to be an Eastern......you done good!! LOL Better to buy an eastern that is supposed to be a cal king opposed to buying a cal king that is supposed to be an eastern!!!!
Post a couple of pics so you can be certain.
Brian
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1.0 Corn snake
1.0 Black rat snake
1.0 Albino Black rat snake
1.0 Everglades rat snake
0.1 Yellow rat snake
1.1 California king snake
1.0 Prairie king snake
0.1 Black king snake
Good luck and Happy Herping
Brian