These printers use the T650H21A cartridge:

Lexmark T 650

Lexmark T 650 DN

Lexmark T 650 DTN

Lexmark T 650 N

Lexmark T 652

Lexmark T 652 DN

Lexmark T 652 DTN

Lexmark T 652 N

Lexmark T 654

Lexmark T 654 DN

Lexmark T 654 DTN

Lexmark T 654 N

Lexmark T 656 DNE

Lexmark TS 654 DN

Lexmark TS 656 DNE