Technical Features for Norelco HQ4 / HQ4PLUS / HQ56 The Norelco HQ4-2 Micro Action replacement heads for Norelco Micro Action double action lift and cut and rotatract models contains 3 cutters and combs. The Norelco HQ4-2 has stainless steel blades for comfortably close shave. Fits the following series: 4400 series 4600 series 4800 series Compatible with the following models 705 710 715 720 725 750 805 835 850 875 885 895 900 905 915 935 945 950 955 965 968 985 1318 1319 1323 1327 1328 3405 3425 3445 3604 3605 3605X 3610 3801 3805 3810 3825 3830 3850 3860 3865 3870 4402 4403 4404 4406 4413 4414 4417 4602 4603 4604 4605 4606 4807 4816 4817 4821 4825 4845 4852 4853 4861 4865 4885 5413 5430 5625 5812 5813 5817 5820 5823 5824 1327D 1328E 1328S 1337C 200SC 300SX 400DX 410DB 4401LC 4601X 482XL 484XL 486XL 500RL 501RL 505RL 5426LC 5625X 5812XL 600RX 605RX 665X 700RL 800RX 825RX HP1601 HP1602 HP1604 HP1605 HP1606 HP1608