The Xerox Phaser 3121 Laser Toner from LD Products is a professionally remanufactured laser toner cartridge that is Guaranteed to meet or exceed the print quality of the OEM 109R00725 Toner Cartridge. Our Xerox Phaser 3121 remanufactured laser toner has new internal parts including OPC drums and wiper blades. Purchasing our Xerox Phaser 3121 Laser Toner is an excellent way to save money without sacrificing quality. Our Xerox Phaser 3121 Laser Toner Cartridge has a '100% Satisfaction Guarantee'. The use of our remanufactured laser toner for the Xerox Phaser 3121 does not void your printer's warranty.