Volkswagen Door Alignment/Centering wedge
Fits:
1960-70 Beetle Convertible
1971-79 Super Beetle Convertible
1956-74 Karmann Ghia

Originals are made from hard rubber that rots away, and replacements only come in black. This way you can save a few dollars and print your own in a color of your choice. I used TPU 95A shore hardness, with 6 outer layer walls and 30% infill.