This is a compatible Brother TN439Y yellow ultra high yield toner cartridge designed to work seamlessly with your Brother laser printer. It offers a yield of up to 9,000 pages, providing an economical alternative to the original Brother TN439Y toner. Manufactured brand new, this cartridge is engineered for reliability and high-quality printing results. The use of compatible replacement toners does not void your printer warranty. We back this product with a 100% Quality Satisfaction Guarantee.