The average Braun shaver cuts 6 million hairs every 18 months, meaning the head gradually wears out, potentially leading to a less close and comfortable shave. Braun recommends replacing your shaver's foil and cutter block every 18 months to maintain peak performance. This Series 9 Pro head captures more hair in the first strokes for an exceptionally gentle shave, achieving results below 0.05 mm for a close and long-lasting shave. The head is designed for simple replacement, attaching easily with a click. It is 100% made in Germany and compatible with Braun Series 9 Pro and Series 9 shavers.