whats the Inner diameter of the main fuel line that connects to the fuel pump inside the car, when you have to remove the rear seat etc ?

there are 3 lines, 2 are which i guess the return and the breather/vent,which are smaller in diamter

i could measure but would prefer to have some fuel hose with me as i know the main one has a split in it and this time (when i fit the newer pump) its gonna split all the way thru

ive measured the little hose thats on the fuel pump itself (that connects to the bracket for it to fit into the fuel tank) and its 7mm,just wondering if the main one of the car is the same

so,what are the diameters

cheers guys

 

ID 5/16" or just under 8mm.
8mm hose can loosen up so go for the proper imperial size.
I assumed the full fuel system was one size, so I'm surprised at the pump hose size.

 

So if i went for 7mm id be about right

i was going to put a join behind the seat,using a 7mm joiner so i didnt have replace the whole hose, just the damaged bit