How can I send a file to a printer in Pipeline?

We are to print labels to be used on Parcels for transport. This should be done from a Pipeline. We are using Zebra printer and I have the label in Zebra format.

Anyone having any idea on how I can send to Printer? What is needed but the printer name and the file?

I can use other formats but the Zebra ZPL also. E.g. PDF, TIFF, PNG.