These are the small rubber wedges located at the rear of the door on a Convertible.
Fits:
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Chasing leaks or rattles on your convertible? Our guide identifies all six wedge types — alignment pin sleeves, door wedges, quarter window wedges, and more — and shows exactly where each one fits on your Beetle or Ghia.
Air Cooled VW Beetle & Ghia Convertible Top Wedge Identification Guide