This is an M16x2 adapter for the logitech shifter with 2 types of shift knobs

The file contains:

-M16x2 adapter

-Sequential shift knob

-Round shift knob

-Cap for round shift knob

To install it you just need to slide the adapter onto the shifter and screw the shift knob onto it

on the round shift knob you can install the cap just by pressing it into the hole on the top 

i recommend printing it in petg but it should work with pla