[Compatible with Multiple Series]: Our series 9000 replacement head compatible with norelco sh90 replacement heads. SH90 Replacement Heads for Shaver series 9000 & 8000 S8950/50, S8950/91. Series 9000; S9311/27 S9311/84, S9311/87, S9321/88, S9511/63, S9531/84, S9721/84, S9721/87 S9721/89 & Star Wars Special Edition: SW6700/91 & SW9700/83 and more. [Comfortable Close Face Touch]: The upgraded SH90 Replacement heads have an ultra-thin head, with a slot for shaving long beards, and a hole for shaving the shortest stubble. Ensure that there is no residue after shaving. The ComfortCut Blade System with rounded profile heads slides smoothly across your skin while protecting it from nicks and cuts. [High Precision Cutting System]: The blades compatible with philips sh90 replacement heads are dual precision cutting system with lift and cut technology. 360 degrees without dead ends. Gently remove your beard, painless and cleaner, the round head design perfectly protects your skin from scratches. [Easy Replacement & Installation]: Easy to take off and replace a new head- just two minutes. After installation, put a drop of oil on each nozzle and run for 10 seconds to get the best experience. It's recommended that you replace the shaving head every 12 months to get the max shave performance. [Packages & Services]: 3Pcs SH90 replacement head (Foil & Cutter) and . A year hassle-free service and lifetime support. Any questions, please do not hesitate to write us, we will be glad to serve you.