Thanks.

The stem I am trying to match is advertised as "Rises 5° and 15° (flip flop able)"

How can that be? This doesn't make any sense based on the above 2 answers (which I am sure are correct, just that they all use different standards).

So what angle would I be looking for when shopping online? I see alot of stems that say 10 degree (like the THompson Elite).

Thanks