ELI5: Explain Like I'm 5

Manufacturer part number

A manufacturer part number is kind of like a code for something you buy. It's like a secret code that helps a store or company know exactly what kind of item you're buying. It usually tells them things like what size, shape, or color the item is, and which company made it. That way, when you buy things from different places, it's easier to tell what you're getting.