The black gates hose does not have the inner barrier liner, at least for now anyway.
Steve, I’m with you on the ”pliable” grey Merc hose.. It was good stuff back in the day. We used it for many applications. I’m not sure what has caused it to flake apart on the inside. It may be the fuel, or the age of the hose it’s self.
The new grey Mercury fuel line now has blue printing on it, as opposed to red print on the old stuff. The new generation hose is good stuff, but not as pliable as it used to be.