Compatible with Philips Norelco Shaver ModelsHQ56 replacement heads are compatible with Philips Norelco HQ3 HQ4 HQ55 HQ56 HQ6 HQ4+ HQ55+ HQ300 HQ442 HQ916 razor blade, fit for HQ6970 HQ6990(HQ69xx) PQ202 Q916 202 q. 200 5 HS19 0 electric shaver and so on. Dual Blade System: HQ56 razor head has a Super Lift and Cut (Dual Blade System), the first blade lifts hair under the skin and the second blade ensures a clean shave. FAST & ACCURATE SHAVING The replacement heads for electric shaver have a rounded edge (low friction) that reduces skin irritation. 15 self-sharpening blades that won't wear out or pull hair. ComfortCut blades provide a fast and comfortable shave. 4D Flexible Head The 4D flexible head automatically adapts to any curve of the face, reduce skin irritation and ensure painless shaving, 360 degrees without dead ends can easily remove long beards and shortest hair. Package Included:3 x HQ56 OEM Replacement Heads and 1 x Comb It is recommended to replace HQ56 heads every 12 months.