This is the headlight-to-fender seal for early 911 & 912 cars. Can also be used on a 356 if extra thickness is required.

Tip: before your car is painted and still in primer, insist on the shop fitting up the headlights with the seals. Usually, a fair amount of filler is used around the headlight area and - surprise - the headlights don't fit after the car is painted!