Samsung SCX-4521F Toner Cartridge, SCX-4521F Black Toner Cartridge - Clickinks.com
Toner Cartridge for Samsung SCX-4521D3 – The Printer Depot
SPS 4521 / SCX4521 Black Toner Cartridge for Use in Samsung SCX-4521, SCX-4321F, SCX-4521F, SCX-4321 Single Color Toner (Black) : Amazon.in: Computers & Accessories