Braun Series 7 70B:Electric Shaver Replacement Part are suitable for Braun 7 series, such as 730S, 720S, 740S, 750, 760CC, 790CC, 799CC, 7865CC, 7899CC, 7840S, 7855S, 7893S and other Braun PULSONIC series . Quality materials: The Braun shaving head is made of high quality ABS and stainless steel, ultra-fine 58 micron blades with a hair clipper, so you don't need to replace the shaving head after long-term continuous use, efficient and easy to use. Recommendation : Spare parts for Braun shavers should be replaced every 18 months. The 70B and 70S models are compatible with each other. Braun shaving heads with better performance:. Braun shaving heads deliver 100% performance and a closer shave for your shaver. To keep your shaving head sharp, reduce skin friction, and get the best performance from your replacement shaving head, clean it regularly. Quiet Operation: Perfect for razors in use with a decibel level not exceeding 30dB, very convenient and quiet. Replace the shaving head with a 25% shaver. For optimal performance, clean it regularly.