This is a Compatible Xerox 109R00639 109R639 Black Laser Toner Cartridge guaranteed to perform with Xerox Laser Printers. It replaces the original Xerox 109R00639 Laser Toner Cartridge. The compatible replacement 109R00639 Laser Toner Cartridges and supplies also known as generic are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM Original Equipment Manufacturer standards for the 109R00639 and offer high-quality printing results. Containing up to 60% new parts including OPC drums, wiper blades, and other internal parts, they are an economical alternative to expensive OEM 109R00639 Xerox Laser Toner Cartridges and supplies, and offer big savings over brand-name 109R00639 Laser Toner Cartridges and supplies. The use of compatible replacement Laser Toner Cartridges and supplies does not void Printer Warranty.We offer a Two Year 100% Quality Satisfaction Guarantee on our Compatible 109R00639 Laser Toner Cartridges and supplies. For use in the following printers Phaser 3110, Phaser 3210.