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
LD Compatible Replacement for Samsung SCX-4521D3 Black Laser Toner Cartridge for use in Samsung SCX-4321, SCX-4521, SCX-4521F, SCX-4521FG, and SCX-4521FR s - Walmart.com
Samsung SCX 4521D3 Black original toner cartridge for SCX 4321 4521F 4521FG 4521FL 4521FR - Office Depot
Premium Compatible SCX-4521F Black Laser Toner Cartridge For Samsung SCX4521
Original Samsung SCX-4521D3 Black Toner - LD Products