Sharp PR42 Ink Roller Red and Black The Sharp PR42 Ink Roller is compatible for use with your Sharp printing calculator to keep it printing clear, easy to read calculations. It can print in red and black so you can have 2 colours on your calculations or receipts. Canon Calculator P23Dts/P170Dh Ink Roller Blue and Red You can replace the ink roller in your Canon calculator with this product. Renew and restore your Canon calculator by replacing the ink roller. The ink in this roller is blue and black. Canon Calculator Ink Roller for P1DTS11 Replace the roller in your Canon calculator using the Canon Calculator Ink Roller for P1DTS11. Restore your Canon calculator and make it work like new by replacing the ink roller. The ink has sharp and clear printing qualities meaning that your printing will be professional looking and easy to read. Canon Printing Calculator Ribbon Black and Red Replace your old ribbon with the Canon Printing Calculator Ribbon. Restore your Canon calculator and make it seem like new with a replacement ribbon. The ribbon is both black and red making it a compact and handy refill.