In 18 months, your Braun shaving components cut over 6 million hairs. Over time, the cutting elements naturally wear down. Therefore, we recommend replacing the shaving head every 18 months to ensure your electric razor performs like new, allowing you to continue shaving thoroughly in just a few strokes. By regularly replacing the shaving head, the razor remains in excellent condition for many years. Compatible with older generation Series 5 electric razors. For Series 5 models from 2020 onwards, please use cutting part 53B.