1, Fits for 5 Series Cheetah Models: 50-R1000s/50-B1300s/50-R1320s/50-R1300s/ 50-M4000cs/50-M4200cs/50-M7200cc/ 50-W4320cs/50-B7000cc 5018S 5035S 5035S 5049s 5050cs 6075cc 6020s 6040cs 6072cc 6075cc 6090cc 7020s 7025s 7027cs 7071cc 7075cc 7085cc 7089cc 2, High-quality materials: It is made of selected materials High quality to achieve continuous, efficient and easy-to-use features. 3, the best shaving effect: In order to achieve the best continuous shaving effect, we recommend changing the shaving head every 18 months. In 18 months, your electric shaver can cut more than 6 million hairs, gradually reducing the trimming performance. 4, special processing technology: The replacement head adopts special processing technology, which further highlights the texture of your shaver. 5, performance restoration: Changing the head can restore the performance of your shaver and achieve a better shaving effect. By changing the head regularly, the razor will maintain its best condition for many