XPOWER METER CRANKSET:Does purchasing a Power Meter Crankset include spacers? What are the specifications?

When purchasing a Power Meter Crankset, three specifications of spacers (0.5mm, 1mm, 2mm) will be provided, two for each specification.
They are used to adjust the length difference between the crank axis and the bottom bracket.
If necessary, they can also be used to adjust the chainline.
The specific number of spacers to use depends on the actual condition of the bike frame.