Braun Series 5 Electric Shaver ORIGINAL Replacement Head, Compatible With 50, 51, 52 Generations Shavers, 54B. The average Braun shaver cuts 6 million hairs every 18 months, meaning the head gradually wears out and your shave can become less close and comfortable. Braun recommends changing your shaver's foil & cutter block every 18 months to get your shaver back to its best. This replacement head features 3 flexible blades that adapt to facial contours for a close, quick shave. The foil technology protects your skin from nicks and cuts. It's easy to change in just one click and is compatible with Series 5 generations 50, 51, and 52. Made in Germany.