Amazon.com: HP Samsung ML-D4550B High-Yield Black Toner Cartridge for ML-4551N; ML-4551NDR; ML-4551ND;l ML-4050; ML-4050N Discontinued by Manufacturer : Office Products
Samsung ML-D4550A Black Toner Cartridge
Samsung ML 4050N user manual : Free Download, Borrow, and Streaming : Internet Archive
Samsung ML-D4550B - High Yield - black - original - toner cartridge (SU689A) - for Samsung ML-4050, ML-4051, ML-4550, ML-4551, ML-4552, ML-4557 | Walmart Canada