ok quick random question, does anyone know exactly what style brake lines are on these trucks?

from what i have gathered it is a "bubble flare" fitting, but has a metric thread on a standard 1/4" line, does that make it a "metric bubble"?

anyways, what i need is a 20'' extention for the end of the rear brake line where it connects to the rubber axle hose for my mega cab long bed conversion, checking at napa we could only find 3/16'' line

 

ok scratch that idea, i just picked up a tube cutter, a double flare tool, some fittings, and a 20'' long double flare tube, just going to cut my line, flare it and extednd it

 

auto zone use to have brake line ike that not sure of sizes they have though

 

I know this sound stupid... but if your taking your line off, you could just look at it and see what type it is then!
Most flare tools can do diff styles.

Length sticking out to be flared is key! Not too much or too little!

 

ya i did that, thats where the problem started, i was hoping to find a 20" extention like they have on the shelf for the double flare, but no body could identify the line due to the bubble flare with standard 1/4" line and a metric fitting it was mess, but i got the problem solved, i just cut the line, installed the fittings and double flared it, and put the 20'' double flare extention in the middle