This is tipical cover for a DC 5.5x2.5 plug, like the one that fatshark, eachine, etc. Use in their goggle.
Depending on the flow you are using in your tpu print, you have to re-scale it. You have to increase a 1% of the scale every 10% extra flow. For example, I print in 120% flow and i scale the stl a 2% extra.