The average Braun shaver cuts 6 million hairs every 18 months. This means the head will gradually wear out and your shave can become less close and comfortable. That's why Braun recommends changing your shaver's foil & cutter block every 18 months to get your shaver back to its best. Take care of your shaver, and it will take care of you. Box includes: 1 X Series 8 Shaver Head Replacement, Silver Features • Peak performance: to maintain your best shave, we recommend replacing the Series 8 head every 18 months • Welcome to the next level of shaving with the Braun Series 8 shaver head: powerful in every stroke and gentle to skin • Precisely close and gentle: with this shaver head's 4 perfectly synchronized shaving elements • Simple replacement: easily attach your new shaver head-just by clicking it on • Quality craftsmanship: 100% made in Germany and compatible with all Series 9 shavers