Chromed brass. These are the correct length For the SWB 750 series Spider.

Part Name: Spider 750 Door Aperture Finisher Trim Strips Set, Chromed Brass Alfastop Product Code: 1CWB218 Original Alfa Romeo Part No: 1495.88.708, 709, 710, 711 Model: Giulietta 750 & 101 Quantity Per Car: 1