Samsung SCX-4521D3 Black Original Toners Twin Pack - Printerinks.com
Genuine Samsung SCX-4521D3 Toner Cartridge for SCX-4321 SCX-4521 NEW Sealed | eBay
Amazon.com: greencycle Compatible Toner Cartridge Replacement for Samsung SCX-4521D3 SCX4521 Use for SCX-4521 SCX-4521F SCX-4521FG SCX-4521FR SCX-4321 SCX-4321F Printer (Black, 1-Pack) : Office Products
Print Star 4521 Toner Cartridge Compatible for Samsung 4521 / SCX-4521D3 Toner Cartridge for Use in Samsung SCX-4321, SCX-4321F, SCX-4521F, SCX-4521FG Single Color Toner (Black) : Amazon.in: Computers & Accessories