Hello Peter, the part numbers that will work in your Rollo printer are FDT4060 OR RDT4060AP. Depending on if you want fan-folded labels or labels on a roll. Either will work.
The labels you ordered are thermal transfer, your Rollo printer requires direct thermal labels.
If you would like to return the labels you ordered, just let us know.
If you have any questions please feel free to contact me.
