It is the case and cap of a pen, as it is modelled in 3D, you can modifiy the shape of it or change the colours whe you are printing.
It has to be printed with a 0.1 mm layer height and supports on the tip, as it has a little slope.
The temperature of the filament has to be by default, however, if you have some issues when printing the first layers, increased the temperature of the bed by 5º.
The author hasn't provided the model origin yet.