Rubber grommet that fits into the rear of the boot/trunk floor on all 105 Series GTs/GTVs, all Giulia & Berlina saloons and Kammtail/Series 2 Spiders 1970-84. It it is used to protect the wiring for the bumper mounted rear numberplate lights where it goes from the rear wiring loom through the boot/trunk floor.
Also used on Montreals where the screen washer line and bonnet/hood release cable fits through the plenum area behind the engine bay.