Yokogawa Electric (YOKOGAWA) Recording paper for pen recorders (Made by Kokusai Chart) Roll chart paper B9622AH 8 rolls Purchased a long time ago. I used 2 out of 10 rolls per box, so this is an unopened set of 8 rolls. The pens in the image were purchased at the same time and are unopened. I don't know if they work. Since the opened ones are working, I think they probably will. Bonus! B9586YB Green 1 bag, 2 pens B9586YA Red 1 bag, 2 pens #YOKOGAWA #YokogawaElectric #PenRecorder #RecordingPaper #RollChartPaper #B9622AH #B9586YA #PenRecorderPen #KokusaiChart