Will this steam Black Ops 2 DLC work for me?

I have black ops 2 on steam, I believe it's the worldwide version or whatever it is and am looking to buy this map pack collection dlc. Just wondering if anyone knows if it would work fine or if there are region restrictions? Thanks

http://www.ebay.com.au/itm/390525083639?ssPageName=STRK:MEWA…

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