Amazon.com: Kyocera TK-1172 Black Toner Genuine Cartridge, Works with Kyocera ECOSYS M2640idw, M2540dw and M2040dn Model Laser Printers, up to 7.2K Yield (1T02S50US0) : Office Products
Kyocera TK-1172 1T02S50US0 Toner Cartridge Black ECOSYS M2640idw/L M2640idw M2540dw M2040dn - Sun Data Supply