THE ROLL / REGISTER SUPPLY INDEX
Machine source notes

Why do inside and outside core diameters matter separately?
A core opening is not necessarily the spool dimension needed by a near-end sensor.

Can a TM-T20 claim stand in for a TM-T20III specification?
Keep the exact model and current manual revision together.

What paper dimensions does the current TM-T20III guide list?
Read the current RevF source table without approving unverified supplier media.

Is an 80 mm paper roll an 80 mm printable receipt?
Paper width and printable area are separate fields.