These High precision quality are of manufacture ,and are not manufactured by or affiliated with for .Head replacement recommended annually New blade After installation, place a tiny drop of oil on each screen and allow to run for 10 seconds. These steps help to a properly-running . HQ69xx, 69xx, AT620 (Shaver series 1000) and also compatible with for models: 31DB, 6423, 6613, 6424LC, 6843, 6853, 6863, 6900 series High Quality Dual layers cutters with Fine steel hq3 Compatible withREPLACES HQ4, HQ4 Plus, HQ55, and HQ55 Plus, HQ56 Fits for Models: 6948XL, 6947XL, 6945XL, 6940LC, 6900LC, 6863XL, 6856XL, 6854XL, 6853XL, 6844XL, 6843XL, 6618X, 6617X, 6616X, 6615X, 6614X, 6613X, 6424LC, 6423LC, HP1318, HP1319, HP1327, HP1323, HP1327D, HP1328, HP1328E, HP1337C, HP1601, HP1602, HP1604, HP1605, HP1606, HP1608, 700RL, 705RL, 710RL, 715RL, 720RL, 725RL, 750RL, 800RX, 805RX, 815RX, 825RX, 835R Colour:As Shown Material:Metal Package Contents: 3 x Shaver Head 1 x brush 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. YJL official store