SH50/52 blade heads replacement for series series 5000 S5370/84, series 5000 S5370/81, Tric shaver AT790/40, Series 5000 S5660/84, Series 5000 S5590/81, Series 5000 S5290/88, Series 5000 S5210/81,AquaTouch-AT8xx, AT7xx, PowerTouch-PT8xx, PT7xx. RESET TO : Replace your shaver heads every 12 months to reset your shaver to a one, to get a better using experience COMFORTABLE: SH50 replacement shaver heads with 9 blade heads just like the original heads, offer you a super comfortable and close shave EASY TO REPLACE: Take out the old shaving heads carefully and then insert replacement; check the heads align exactly in the setting. When you close the shaving head properly, you hear it click into pace Material:Metal colour:silver Package Contents: 18 * 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.