They don't just keep the nozzle clean

As an in-line system

Ultimaker Nylon

which can also be converted into a flat or Phillips screwdriver

Cooling Fan/Blæser 5VDC - UltiMaker 2+ Raise 3D - E3 - Reservedele They don't just keep theCooling Fan 5VDC for Hotend UltiMaker 2+ This cooling fan is designed to cool your printer's hotend effectively and prevent overheating, ensuring stable extrusion and improving print quality. Precise temperature control The dedicated cooling fan helps maintain a constant temperature at the hot end, which is essential for achieving smooth and precise prints. This allows you to print complex models with fine details without the risk of melting or