12 Pack Ink Ribbon Replacement for Okidata 320 420 Turbo 52102001 52104001 (12-pk, Black) Okidata ML 320 Ribbon Black 52102001 52104001182 390 391 420 490 720 ( 12-Pack ) 2 Yrs Longevity Ink Quantity: 12 pieces Color: Black Indiv Sealed Fresh Pack