Lexmark
99A2021
is compatible in the following Printer Models:
Lexmark Mono Laser
Lexmark T630 (4060-000)
Lexmark T630dn (4060-010)
Lexmark T520d (4520-001)
Lexmark T520dn (4520-002)
Lexmark T522 (4520-210)
Lexmark T522dn (4520-220)