Our thermal paper rolls are compatible with Brother RJ 4230, RJ 4250, RJ 4040, and RJ 4030 mobile printers. Compatible replacement for Brother RD-M01U5 Our thermal paper rolls are specially designed to fit a range of Brother models, including RJ 4230, RJ 4250, RJ 4040, and RJ 4030, this thermal paper ensures you achieve crisp, professional prints every time. Whether you're in retail, warehousing, healthcare, or any field where mobile printing is a necessity, our thermal paper rolls which fit Brother RJ 4230, RJ 4250, RJ 4040, and RJ 4030 printers should be your go-to choice. Ensure your operations run smoothly with consistently high-quality prints, even in demanding environments.