Identifying your Printer Model Desktop printers These printers can easily be identified visually. Zebra ZD500R: Zebra ZD621R: Printronix T800 (T820, T830): Industrial Printers These printers can be harder to tell apart visually, however you can usually find the model number printed on the front as well. Zebra ZT410: Zebra ZT411: Printronix T4000: Note: The T4000 has a media cover that can fold when opened, whereas the T6000e does not. Printronix T6000e: Note: The T4000 has a media cover that can fold when opened, whereas the T6000e does not.