Fuel tank vent line size?

[McLovin]

Okay so I need to replace the fuel tank vent line that is about 5' long and is either 1/8" or 3/16" ID just not sure and in reality either will probably work. Does anyone know for sure?
Thanks

 

[NapaMatt]

1/8 all your carb vent and tank lines clear..

 

[McLovin]

Great good to know, thanks