Compatibility: Fits a wide range of calculator and cash register models Compatible for Canon, Sharp, and Adler Royal, such as for Canon P1-DH V, for Adler Royal 101 series, for Sharp EA-770R, etc. Value-packed: Comes with 3 packs of IR-40 replacement ink rollers, fulfilling your long-term usage needs. Double Ink Volume: Compared to most similar products, we offers extending the lifespan of your calculator and ensuring darker, more vivid impressions. Individually Sealed : With a strict freshness policy, each roller is individually sealed to guarantee fresh ink. This sets it apart from competitors who store rollers for years, providing superior writing results. Useful Tips: Ideal for ink roller print calculators and can be used as a substitute for CP16. It features black printing. Remember to store it away from direct sunlight, extreme temperatures, dust, and moisture.Known as CP16, IR40, IR30, NR40, PR40