what size fitting do i need for fuel line?

[GLITCH]

Im wanting to get my fuel line set up for my pressure gauge and tee'd for my nx kit but i dont know what size of barbed fitting to use. Can you guys help me out, i dont want to cut it to find out what size it is. i want the parts i need when I do it.

thanks for helping me out

GLITCH

[RedNOSceli]

1/4inch