Replacement blades for Philips Norelco Series 6000 Within one year your shaver heads cut 4.5 million hairs on your face. Replace the shaver heads and get back to 100% performance. Genuine SkinProtect shaving heads made in the Netherlands Blades capture hair in fewer passes for smooth shave. For maximum shaving performance, it is recommended to replace your shaving head once every 12 months. Includes 3 shaving heads.