Braun Series 3 Electric Shaver Replacement Foil Cartridge, 31B High performance cutter and foil for your shaver. Through its foil patterns the smart foil captures hairs growing in different directions. Compatible with old generation Series 3 (390cc, 370), contour, flex XP, flex integral. Easily replace your Braun shaver parts every 18 months to maintain peak performance Directions to Use First remove the foil, either by pressing the release button if your shaver has one or by pulling the foil. Next rotate the cutter block by 90 degrees and pull it off, holding it at the ends to avoid touching the blades. To fit parts, simply carry out the same procedure in reverse. .
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