The 20K takes 300 dpi Hewlett-Packard ink jet address printing to its pinnacle. The six internal fonts can be printed at 75, 120, 150, 200 or 300 dpi, bold or standard density, and in six different print widths, at speeds up to 20,000 envelopes per hour.

 Postal barcodes are automatically generated in the printer from the postal code in the address. The 20K can handle media from .076mm to 15mm thick. No other table top address printer can handle such a wide range of materials.