By using system components manufactured by Lexmark, you are assured a higher level of reliability and are less likely to experience compatibility problems. Lexmark testing is among the most rigorous in the industry so you can be confident that you're receiving the highest quality and dependability. This is an Easystrike Lift-off tape cassette compatible with IBM 6746 / 47 / 70 /79 /81 /83 / 84 / 85 /87 / 88 and IBM WheelWriter 1000 / 1500 / 2500 / 3000 / 3500 / 5000 / 7000.