2002 2RZFE Fuel Vapor Hose replacement

This is more just general knowledge.

I had to replace my fuel vapor hose, as mine had some cracks in it (I believe causing a P0171 code I'm chasing). I thought I'd upload part numbers and markings on the hoses in case anyone needed them.

Here is my engine, my engine with the hose outlined, the part I got from the dealer (23827-75250). The markings on the old hose, which I believe is original to the truck (08FUEL>FPM<XH=02) and the markings on the new hose (08FUEL>FPM<PK=04). No idea what the markings mean but may be helpful to someone when tracking down a replacement (either OEM or aftermarket).

https://imgur.com/a/dfO4McC

 

What's both the inner and outer dimensions of the tubing? Does the "08fuel" indicate the size?