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 PHD20-2241-01 print head Thermal transfer

Datamax O'Neil PHD20-2241-01 print head Thermal transfer

Datamax O'Neil
£825.99
Datamax O'Neil PHD20-2181-01 print head Direct thermal

Datamax O'Neil PHD20-2181-01 print head Direct thermal

Datamax O'Neil
£472.99
Zebra P1112640-240 print head

Zebra P1112640-240 print head

Zebra
£128.99
Zebra P1112640-019 print head

Zebra P1112640-019 print head

Zebra
£128.99
Zebra P1083347-006 print head Thermal transfer

Zebra P1083347-006 print head Thermal transfer

Zebra
£520.99
Zebra P1083320-012 print head Thermal transfer

Zebra P1083320-012 print head Thermal transfer

Zebra
£754.99
Zebra P1058930-012 print head Thermal transfer

Zebra P1058930-012 print head Thermal transfer

Zebra
£491.99
Datamax O'Neil PHD20-2281-01 print head Thermal transfer

Datamax O'Neil PHD20-2281-01 print head Thermal transfer

Datamax O'Neil
£1,419.99
Datamax O'Neil PHD20-2268-01 print head Direct thermal

Datamax O'Neil PHD20-2268-01 print head Direct thermal

Datamax O'Neil
£190.99
Datamax O'Neil PHD20-2246-01 print head Direct thermal

Datamax O'Neil PHD20-2246-01 print head Direct thermal

Datamax O'Neil
£930.99
Datamax O'Neil PHD20-2240-01 print head Thermal transfer

Datamax O'Neil PHD20-2240-01 print head Thermal transfer

Datamax O'Neil
£548.99
Datamax O'Neil PHD20-2209-01 print head Direct thermal

Datamax O'Neil PHD20-2209-01 print head Direct thermal

Datamax O'Neil
£1,521.99