These are part of inkjet printers, which prints ink onto paper. They are fixed heads, which are built into the printer, or disposable heads, which are built into the disposable ink carttridges.
Datamax O'Neil PHD20-2192-01 print head Direct thermal

Datamax O'Neil PHD20-2192-01 print head Direct thermal

Datamax O'Neil
£270.99
Zebra P1112640-051 print head Direct thermal

Zebra P1112640-051 print head Direct thermal

Zebra
£242.99
Zebra P1083320-016 print head

Zebra P1083320-016 print head

Zebra
£736.99
Zebra ZT410 Kit Printhead 203DPI

Zebra ZT410 Kit Printhead 203DPI

Zebra
£437.99
Zebra P1046696-099 print head

Zebra P1046696-099 print head

Zebra
£306.99
Zebra P1037974-005 print head

Zebra P1037974-005 print head

Zebra
£465.99
Zebra P1004237 print head Thermal transfer

Zebra P1004237 print head Thermal transfer

Zebra
£764.99
Datamax O'Neil PHD20-2261-01 print head Thermal transfer

Datamax O'Neil PHD20-2261-01 print head Thermal transfer

Datamax O'Neil
£489.99
Datamax O'Neil PHD20-2242-01 print head Thermal transfer

Datamax O'Neil PHD20-2242-01 print head Thermal transfer

Datamax O'Neil
£938.99
Datamax O'Neil PHD20-2220-01 print head Direct thermal

Datamax O'Neil PHD20-2220-01 print head Direct thermal

Datamax O'Neil
£485.99
Datamax O'Neil PHD20-2182-01 print head Direct thermal

Datamax O'Neil PHD20-2182-01 print head Direct thermal

Datamax O'Neil
£624.99
Honeywell PHD105423 print head Thermal transfer

Honeywell PHD105423 print head Thermal transfer

Honeywell
£740.99