Compatible with multiple series: SH50/52 replacement heads for 5000 series (S5xxx), AquaTouch (S5xxx), AquaTouch (AT8xx, AT7xx) and PowerTouch (PT8xx, PT7xx).COMFORTABLE TO-TOUCH FIT: The SH50 Men's Electric Shaver Replacement Head Blade is a dual precision cutting system with lift cutting technology.Super lifts and shaves for a comfortable close shave for truly smooth results.Quick shave: The blades of the razor's replacement head lift and cut all remaining hairs and hairs - in just a few strokes.360 degrees without dead ends.Removes beard gently, painlessly and cleanly, and the rounded tip perfectly protects your skin from scratches.Easy replacement: The head can be easily removed and replaced with a new one in just two minutes.After installation, put a drop of oil on each nozzle and operate for 10 seconds for the best experience.It is recommended to replace shaving heads every 12 months for optimal shaving performance.