If you're curious as to how this item scales down with your character's level (for purposes of twinking or general curiosity), you can use the LINK button at the top of this item page to link the item in-game: the WoW client will automatically scale the item stats down to your character's level for you. This works with all the other Heirloom items as well.
Steps in case you are unfamiliar with how to use Wowhead item links:
1. Click the link button above, there will be a popup window with some automatically highlighted text.
2. Copy the text (Windows: Ctrl-C, Mac: Cmd-C) and close the popup window.
3. Open (or switch to) WoW and press Enter to open up your chat dialog.
4. Paste the code into the box (Windows: Ctrl-V, Mac: Cmd-V) and press Enter.
5. A message in white text will appear in your chat log followed by an item link.
6. You can click this link to view the details and can Ctrl-click it to view it on your character.