High Definition Black Pigment Ink used to refill all Lexmark and Dell black inkjet cartridges. (excluding 50, 70 and similar older models), 1 Gallon.Lexmark 3, 4A, 14A, 16, 17, 23A, 28A, 32, 34, 36A, 42A, 44XL, 75, 82, 100A.DELL Series 1, 2, 3, 5, 7, 8, 9, 11, 15, 20, 21, 23, 24.