Vacuum Advance Hose Diameter?

[Fiat88]

Anyone know the size of the vacuum hose which runs from the distributor to the carb? Thx.

[TJC]

I believe it's equivalent to a 3/16" ID (5mm). I don't think it's as big as a 1/4", but I do know it's bigger than 1/8" ID.

[So Cal Mark]

5/32nds