-an fuel lines?

[Motakitty]

I'm thinking about using an fuel lines but not sure what size and what kind of fittings. Has anyone used these. I'm looking at the black ones. And could you just use the lines and use clamps on the push fittings?

 

[crassius]

there are 2 sizes of fittings on diff carbs, one thinner than other, so stretchy lines are often in kits - tank petcocks are very thick - I often use wide lines on top and thin lines below fuel filter