Compatible with following models: these SH50/52 shaver replacement heads are compatible with for Norelco shaver series 5000 (S5xxx), AquaTouch (S5xxx), AquaTouch (AT8xx, AT7xx) and PowerTouch (PT8xx, PT7xx); You can check if the model of your shaver models are suitable before purchasing 360 Degrees shaving experience: our replacement heads for shavers are equipped with 360 degrees design, which can care about most dead ends, the head is in round shape, can gently shave, will not scratch your face or remove the unwanted parts, efficient and have good effects Easy to install: these shaver heads are convenient to install for replacement, after installation process, you can place a tiny drop of oil on each head and run for 10 seconds to maintain a properly-running function; It's recommended that you should replace the shaving heads every 12 months for nice performance 9 Pointed and multi precision blades: each SH50/52 replacement head contains 9 pointed blades inside the head, the pointed design makes a more efficient work, good for shaving your beard without leaving traces, you will look neat and more attractive; These heads are washable for reuse, you can clean them after shaving or brush them with a cleaning brush colour: silver Material: metal Size: diameter 20.4mm Package Contents: 3 x Shaver Head / 9 x Shaver Head / 12 x Shaver Head Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.