Review on 🖩 High-Quality 2-Pack of Black/Red Calculator Ink Rolls for Precise Calculations by Nathan Tsugawa

I have a Canon P170-DH that they are compatible with. I bought a twin pack and the first reel I put in didn't let the number wheels work freely. After using it once, the carriage could not return home correctly, so red/black would not be correct and the characters on the right would be confused. The second roller works perfectly. I wouldn't buy them again.