What does this symbol mean?

I saw this symbol in a You Tube piece of music and I couldn't find out what it means. <12> The tab ran something like this

<12>
|
|
7 | 7

I Know you music theorists out there will know the answer. I searched google until I am seeing double, and couldn't find this symbol. I can't get the lines to set up properly but between the two 7's the line ran straight up to the unknown symbol.

Maybe it's someone's idea of indicating an octave jump.

Harmonic at the 12th fret?

Gary52 said:

Harmonic at the 12th fret?

Click to expand...

That's what I take it to mean also.

Thank you everyone. Now I get it.