Fuel hose size

[TR Tony]

Could someone please tell me what size/internal diameter is the fuel hose that runs from the fuel rail to the float bowls on a UK car with SUs?

I need to replace mine as cracks are appearing ....

Thanks in advance.

Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">