Compatible with old and new generation Series 5 including 5020s, 5030s, 5040s, 5050cc, 5070cc, 5090cc Easily replace Braun shaver parts every 18 months to maintain optimum performance Less investment for best performance In 18 months, your Braun shaverwill cut an average of 6,000,000 hairs. While performing this important task, the cutting parts will gradually wear down and your shave may become less close and comfortable. That's why Braun recommends replacing your shaver's foils and cartridges every 18 months to keep your shaver performing at its best. For a productive shave every day. How to replace the shaving heads With older models that had the foil and blade holderas two separate parts, you need to replace the parts in two steps: first remove the foil and if necessary press the release button Your shaver has one, or by pulling the foil. Next rotate the cutting block 90 degrees and pull it off, holding the end to avoid contact with the blade. To install new parts, just reverse the same steps. Products from BAZHOU's store