Anyone know what this means?

I'm guessing it's maximum 54.90 and minimum of 54.70 but I'd like some confirmation.
Quote by mastaofrocknrol
are you from denmark?
because of al the O`s with the stripes init

Quote by SG_dave
the o's with a stripe are the greek letter Phi used to denote an angle

I thought phi was the measurment of magnetic flux?
and the O with a strike through it was cercumfrance?
The O with a line through it references that the dimension is a diameter, not an angle or circumference.

But thanks, got it.