This is a compatible Xerox Phaser 106R01379 high capacity black laser toner cartridge, designed to work with your Xerox Phaser 3100MFP laser printer. It delivers a yield of up to 4,000 pages, making it an economical choice for high-volume printing needs. The cartridge is engineered for reliability and quality, containing new drum, smart chip, and other internal components. Using compatible cartridges does not void your printer warranty and provides significant savings compared to OEM options. Backed by our 100% Quality Satisfaction Guarantee.