1G Stock 1g fuel line return hose size?

[4gfun]

What is the size of the rubber fuel line that goes from the fuel pressure regulator to the hard fuel return line?

Is it 5/16 or is it 3/8? I found the answer once after searching for hours....never have been able to find it again.

Thanks

 

[19Eclipse90]

It's 8mm, closer to 5/16".

 

[4gfun]

Thank you.