I found it not sure of the name

didn't you say you're a teacher?

it's called a center adapter, look at your pitcha na lady

I do not know if there is a proper name for it, but I know about it.

from Wikipedia 

A 45 rpm adapter (also 45 rpm record insert, or 45 rpm spindle adapter) is a small plastic or metal insert that goes in the middle of a 45-rpm record so it will play on a turntable. The adapter could be a small solid circle that fits onto the bottom of the spindle (meaning only one 45 could be played at a time) or a larger adapter that fits over the entire spindle, permitting a stack of 45s to be played.

45 spindle.

Some one send me that name lol

a round ting

It is called a spindle. I even have a biker shirt some 20 years old with the logo on it. I rode that shirt in all sorts of terrain and it still looks good. The only reason I do not wear it now is because it is so dated by that spindle.

u r right