greencycle &reg; 1 PK Black ML1640 Toner Cartridge For Samsung ML-1640 ML-2240 series Printer Shipping from USA. Full 1 year warranty against manufacturer defects and print quality. Brand new toner cartridge unconditionally guaranteed to provide same performance and reliability as genuine Samsung cartridges. Yield: Toner cartridge up to 3,000 pages at 5% coverage (Letter size Paper) Actual toner yield varies with usage, graphics printed and environmental conditions. Compatible Samsung Printer below:Samsung ML-1640 ML-2240 series