When you are looking at the CC-WMX-L76C-TE or CC-WMX-L76C-TE-1 from Digi-International there is not difference in these two part numbers the -1 suffix is simply calling out that it would be a single piece from the manufacturer… If you order without the -1 suffix it would be a box of 50 from the manufacturer. This is more so confusing as the the manufacturer requires a 50 piece MOQ on the single piece part.