There are two versions. One is just longer than the other. The one on the pictures is the longer (40mm) version.

These joysticks give you much finner control when flying your drone, as compared to the original sticks that are about half the size.

After the print, you have to screw an m4 grub screw inside (the printed part has threads inside the hole). The length of that screw has to be 20mm, and it looks like this:

https://m.media-amazon.com/images/I/613urJlJWfL.SL1024.jpg

Suggested settings for printing:

-USE BRIM, otherwise the stick will fall to the bed due to the small contact point

-Don't change orientation

-PLA, 210/60 (depends on your filament)

-0.4mm nozzle

-0.2mm layer height

-No supports