PEAK PERFORMANCE: to maintain your best shave, we recommend replacing the shaver head every 18 months EFFICIENT SHAVING: featuring 5 shaving elements to cut through millions of hairs with ease PERFECT SHAVE IN ONE STROKE: with this shaver heads 5 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 Series 9 electric shavers