These are parts that are found in more than one engine or car. Ie. Motors, Wheelsets, screws|Washers|Nuts, grabhandles, bulbs.....). Some of the parts here are sourced from OEM manufacturers and not from LGB, in order to pass on the savings.
Example: LGB produces no motors. They are all manufacturer by a German company called Buehler. We have a supply line with common Buehler motors and provide you with the 100% identical motor.
Some products are are smart parts that either replace LGB® equivalent parts or supplement them. Among them are ProLine™ parts.