If you have a removable tow bar on a Land Rover, This is the plug you put in to prevent dirt coming in. Its a copy of the original plug as seen on the pictures. (the original is the red
Prima Value ABS
I tested with PLA but don't know the durability of it on the long run.. I choose ABS because its more tuff. I printed it with a raft because it shrinks a lot and pulled up the corners. I even extended the raft 1 cm out to get enough adhesion, and even that was almost not enough.. The 'towers' are a little off angel, but it should not be a problem. If you need the drawing to modify it please contact me..
I bought an original Land Rover tower plug course i needed one. Then I just measured and drew a new one in Sketchup.