Universal trim to add a little color to your car's ac registers. Measure your car, and scale the length to your heart's content. Print in TPU, there should be a bit of friction to hold them in place, otherwise, scale the gap to be a bit larger. Could scale in Z too if you want more of the register covered but that's really only noticeable when they're closed.

Note it hasn't quite gotten hot enough here yet to see any degradation in the TPU from a hot day, but probably best to avoid these if you park in the sunlight for a long time.