Good to know - These Philips replacement heads fit perfectly with the Series 8000, 9000 and 9000 Prestige shavers- Its self-sharpening blades mean you'll always get a close shave- They're water washable, so it's easy to keep them clean- You can easily replace the shaver head in just 2 simple stepsPlease note: These shaver heads are compatible with Philips Series 8000, 9000 and 9000 Prestige shavers.