Hmmm
You're gonna want to get the official word on the hose ID. Like check out websites to see. Cuz this decimal stuff is confusing me

. Bottom line is that if something is 3/8" ID and has a barb, the barb gets a bit skinnier just so the ID can slip over it. The OD doesn't matter too much. They have thick walled and thin walled hose. The ID stays the same, but the OD changes with the wall thickness. However, the hose is enterchangable, regardless of OD. Do you have any 3/8" ID hose? It would be nice if you did cuz you could then see how everything fits. Bottom line is that you should be fine though... try and go to home depot and get a small bit of 3/8" hose to see how it fits on the pump/blackice... then lmk.
-Kevin