Braun Combi 31S Series 3 Flex/Integral Replacement Foil & Cutter Pack

Small investment, peak performance
Within 18 months, your Braun shaver will cut an average of 6,000,000
hairs. In accomplishing this substantial task, the cutting parts will
gradually wear out and your shave may become less close and comfortable.
That’s why Braun recommends changing your shaver’s foil and cutter block
every 18 months to maintain your shaver’s maximum performance. For an
efficient shave every day.

How to replace your shaver head
For older models which have a foil and a cutter block as two
independent parts you will need to change the parts in two steps: 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.

Compatibility
Braun Series 3 Electric Shaver Replacement Foil Cartridge, 31S is
compatible with Series 3 Contour, Flex XP and Flex Integral shavers only