This is the ribbon you need for your ADP 50 printer.

This is the ribbon you need for your ADP 630 printer.

This is the ribbon you need for your ADP 36 printer.

This is the ribbon you need for your ADP 210 N printer.

Genuine Texas Instruments 33 yard black printer ribbon (15 million characters) 12 box.  Fits Texas Instruments 8920, 8930.

Genuine Okidata black printer ribbon (7.5 million characters).  Fits OKI Pacemark 3410.

Genuine Tally/Genicom black printer ribbon (20 million characters).  Fits TallyGenicom MT230, MT330, MT340, MT350, MT360, MT380, MT400, T2045, T2060, T2155, T2170, T2265, T2280.