The replacement blades (combs and cutters only - not a complete head frame) for Philips Norelco Series 9000 shavers, the SH90 includes newly designed V-Track Precision blades that collect hair in the optimal cutting position to deliver our closest shave ever. For maximum shaving performance, it is recommended to replace the SH90 once every 12 months. Repacement Blade specifically for: S8xxx and S9xxx (Shaver series 8000 and 9000).