High precision quality manufactured replacement shaver heads. Head replacement is recommended annually. After installation, apply a small drop of oil on each screen and allow the device to run for 10 seconds to ensure proper operation. Compatible with models: HQ69xx, 69xx, AT620 (Shaver series 1000), 31DB, 6423, 6613, 6424LC, 6843, 6853, 6863, 6900 series. Also fits 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. High quality dual layer cutters made with fine steel. Replaces HQ4, HQ4 Plus, HQ55, HQ55 Plus, HQ56. Color: As shown Material: Metal Package Contents: 3 x Shaver Head 1 x Cleaning Brush Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement may vary by 1-3 cm.