Replacement ribbon includes red and black so you can print in two colors for easy reading and tracking. It is compatible with Victor 12-Digit Heavy-duty, Extra Heavy-duty and Desktop Two-Color Printing Calculators as well as Victor 14-digit and 10-digit Professional Heavy-duty Printing Calculators, Canon 12-digit Desktop Two-color MP27D Printing Calculator, Canon 12-digit Two-color MP25DVS Desktop Display Printing Calculator, Sharp 12-digit Two-color EL2630PIII Desktop Print/Display Calculator and Sharp 12-digit Two-color QS2760H Business Calculator.