Braun Series 5 52 S Silver Foil and Cutter Replacement Head: compatible with previous generations of Series 5 models High Performance Parts. Get back 100% performance, for a fraction of the original cost. Your Braun electric shaver is a high performance machine with over 200 components. Your Braun electric shaver is designed to last and only the cutting parts need to be replaced. For a perfect shave everyday, Braun recommends changing your shaver's foil & cutter block every 18 months to maintain your shaver's maximum 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. Prevent skin irritation with this replacement head and you will get back to the superior close shave you have come to expect from Braun. Replace the cutting parts every 18 months to bring back 100% performance of your Braun electric shaver. Designed in Germany, built to last.