The Apple LaserWriter 640s 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 M4683GA Toner Cartridge. Our Apple LaserWriter 640s remanufactured laser toner has new internal parts including OPC drums and wiper blades. Purchasing our Apple LaserWriter 640s Laser Toner is an excellent way to save money without sacrificing quality. Our Apple LaserWriter 640s Laser Toner Cartridge has a 'Two Year 100% Quality Satisfaction Guarantee'. The use of our remanufactured laser toner for the Apple LaserWriter 640s does not void your printer's warranty.