DLC - SMITE - Spring Split Pass 2017 + Bonus FP
https://steamdb.info/sub/152153/apps/

Okey, but what about other Unknown packages? There are so many, I am hunting for some expensive game and don't want to be deceived when trade.

Via steamdb...

How damn it.

If you're looking for a sub for a particular game, you can look up the game on [http://steamdb.info]steamdb[/url] using the search bar at the top left of the page, Deadpool for example. From there, you'll see a list of tabs on the left side of the page, you'll want to click on packages. All of the sub ids for the game in question will be listed there.

https://steamdb.info/app/224060/subs/

On the other hand, if you're looking to see what is included in a particular package, use the steamdb search bar and type sub/[sub id] (so for the example you used in your op, type sub/152153. This will redirect you to the sub page and you can check what's included by clicking the app tab on the left side of the page. Hopefully this is detailed enough to explain what you're looking for.

EDIT: You can also use the steamdb extension (linked below) to get a direct steamdb links for unknown packages.

https://steamdb.info/extension/

If you want to identify "Unknown package 152153", put the number after "https://steamdb.info/sub/" and go to that URL.

"https://steamdb.info/sub/" + "152153" = https://steamdb.info/sub/152153

On the left of that page, click on "Apps": Each app listed is a game/DLC on that gift.

Tnx guys!