This is the Ultimaker 2+ heater cartridge 24V 35W . It is the improved heater cartridge for the printhead for the Ultimaker 2+.
This part is compatible with the following models
- Ultimaker 2
- Ultimaker 2+
- Ultimaker 2 Extended
- Ultimaker 2 Extended+
- Ultimaker 2+ Connect
Instructions for replacing the Heater Cartridge can be found here