This is a compatible replacement for the Brother LC21M magenta ink cartridge. It is designed to deliver high-quality printouts and is manufactured to meet the same ISO-9001 specifications as the original Brother cartridges. The standard yield cartridge provides up to 240 pages, making it an economical choice for your printing needs. Save significantly compared to the MSRP of brand name cartridges while enjoying reliable performance. Backed by our 100% Quality Satisfaction Guarantee.