This is recording roll paper for a Sharp portable computer from a while back. It was used in a structure similar to a plotter, which printed with 4 or 5 colors of ink (like a water-based ballpoint pen). It's the type that moves the paper back and forth to draw characters and pictures. It doesn't use a cardboard core. The dimensions shown in the diagram are measured values, so there may be slight errors. It is not thermal paper, so it is stable for a long period. I unexpectedly found 9 rolls (3 sets x 3) remaining in another location, so I'm adjusting the price slightly. (Significant price reduction when looking at it per roll) When shipping, the sets of 3 will be separated into 2 rolls + 1 roll for packaging.