776LG - Foam LENS gasket for 776 (Lucas ST38 or 'Pork Pie') type rear lamps

3mm thick polyeurethane foam LENS gasket for part number series 776 and CA1249 (ST38 or 'Pork Pie') rear lamps. With semi circular cut out for rim retaining screw. Often two are used per lamp to seal the lens in position.