Original Samsung Toner MLT-D1082S Black for ML 1640 2240 Neutral Box | eBay
Black Toner Cartridge Compatible with Samsung ML-1640 (N6050)
Samsung MLT-D108S Black Toner Cartridge | 1ink.com
User manual Samsung ML-1640 (English - 83 pages)
Amazon.com: Toner Cartridge MLT-D108S Works for Samsung ML-1640 ML2240 ML2241 ML1641 Series Monochrome Laser Printer, Yields Up to 2,000 Pages Office Products Black : Office Products