Welcome to the Samsung ML-4050N product page. Here you can find information and pricing for your Samsung MLD4550A Genuine Samsung Toner Cartridge. Easy online ordering of your MLD4550B Premium Compatible High-Yield Toner Cartridge, MLD4550A, MLD4550B, can be completed from this page. Tonerprice.com backs all of our cartridges with our exclusive warranty. As always, we provide free ground shipping on orders over $75 within the contiguous United States from 5 warehouses nationwide.