The Nukote Calculator Ink Roller NR40P-2 is a genuine/original black ink ribbon designed for use with various calculator brands such as Canon, Sharp, Texas Instruments, and Casio. Specifically compatible with Texas Instruments, Canon, and Sharp models, this dot matrix print technology ensures precise and high-quality printing. This lot of 3 ink rollers from Nukote is ideal for those in need of genuine/original ink for their calculator or printer, providing reliable and consistent results.