This is a remanufactured replacement for the Samsung ML-D4550B high yield black laser toner cartridge, delivering up to 20,000 pages. Engineered for compatibility with your Samsung laser printer, it replaces the original Samsung ML-D4550B cartridge. This remanufactured toner is constructed with new and used parts, including a new smart chip, ensuring reliable performance and high-quality printing results. Economical and environmentally friendly, it offers significant savings over brand-name Samsung toner cartridges. The use of remanufactured toner cartridges does not void your printer's warranty, and we back this product with a 100% Quality Satisfaction Guarantee.