New old stock black bakelite insulating flange for a mechanical fuel pump — a thick rounded-square plate with a central bore and four mounting holes and a small notch / tab. Installed between the mechanical fuel pump and the engine block. Part A 110 091 02 81. Individual unit sealed in its own poly bag. New old stock — vintage Mercedes-Benz inventory, never installed. At least one unit shows coating peel / shelf wear. Stored in Bin E37 #28.