Amazon.com: Black Toner Refill Kit w/chip compatible with Samsung ML-1640 : Office Products
Black Toner Cartridge Compatible For Samsung MLT-D108S (ML-1640) – Precision Toner USA
Amazon.com: SuperInk Compatible Toner Cartridge Replacement for Samsung MLT-D108S MLTD108S to use with ML-2240 ML-1640 (Black, 1-Pack) : Office Products