Review on 🖨️ Printerfield IR-40T Ink Roller: High-Quality Replacement for Casio, Canon, and Sharp Calculators (6 Pack) - Black & Red Ribbons by Joe Griggs

Not the fault of anyone but the calculator manufacturer, but my goodness, those suction cups are really hard to replace! I messed up 2 of them trying to fit it in! word to the wise. Take out the old ink cartridge, and then try to reinsert the old one. Once you figure it out, try a new one. If it's not perfect, red won't print. And if you try the same one again, the red will be polluted with black. As I said, the good thing is that it comes in a six-pack 😉