Suitable for 5 series and 6 series models:50-R1000s/50-B1200S/50-B1300s/50-R1320s/50-R1300s/51-M1200s50-M1000s/50-M4000cs/50-M4200cs/50-M7200cc/50-W4200/50-W4320cs/50-B7000cc5018S 5049s 5050cs 5762 57646075cc 6020s 6040cs 6072cc 6075cc 6090cc7020s 7025s 7027cs 7071cc 7075cc7085cc 7089ccQuiet Use - 53B replacement head blades are compatible with Series 5 and Series 6 replacement parts, with a decibel level of no more than 30 dB, very comfortable, and can get a quiet shaving experience. In addition, it is easy to replace the shaver.Clean Shave - The geometric mesh membrane of the Series 5 and Series 6 replacement blades fits closely to the face, and the ergonomic design provides a larger contact area for a clean shave, with a lift trimmer in the middle to lift the hard-to-trim areas of the beard, leaving no residue on the chin after shaving.New Generation - Comfortable Shaving Feeling, Series 5/6 53B Replacement Head for Series 5 and Series 6 adopts an automatic floating design, which can automatically fit the undulating facial contours, giving the face a very comfortable and natural feeling.Package Contents: Replacement Shaver Head*1