What hoses are used on the fuel filler neck?

So I'm replacing the fuel neck after it leak from a smoke test. I'm looking to replace the hoses that come off it also while I'm there. What kind of hoses can I use for this? Thanks!

Also I'm not talking about the main rigid hose. I'm talking about the flexible hoses that come off the breather ports and stuff.

 

I used fuel line from the local parts store. Most of it was 3/8" ID hose, with a couple feet worth of 1/4" ID hose. If you want to replace all of the gas tank rubber, these are the hoses that are molded, the bottom one has two different sized ends.



Might consider new gaskets as well while you have the bed removed:

 

thanks for the info, it helps a lot