Braun Series 3 Shaver Replacement Integrated Foil and Cutter Black Blades, Cassette, F/C21B

Series 3 compatible replacement blades Compatible models: 301s, 300s-B, 300s-R, 310s Recommended replacement interval: Approximately 18 months Integrated foil and inner blade cassette type. Replacing both the foil and inner blade simultaneously restores a shave as good as new.