Compatible with 5 Series, 6 Series, and Cheetah Series models: 50-R1000s, 50-B1300s, 50-R1320s, 50-R1300s, 50-M4000cs, 50-M4200cs, 50-M7200cc, 50-W4320cs, 50-B7000cc, 5018S, 5020S, 5035s, 5049s, 5050cs, 6075cc, 6020s, 6040cs, 6072cc, 6075cc, 6090cc, 7020s, 7025s, 7027cs, 7071cc, 7075cc, 7085cc, 7089cc. High-Quality Materials: Made from selected high-quality materials for continuous, efficient, and easy-to-use performance. Optimal Shaving Performance: For best results, replace the shaving head every 18 months. Over this period, the shaver may cut over 6 million hairs, after which cutting performance may gradually decline. Special Processing Technology: The replacement head features advanced processing technology that enhances the overall performance and feel of your shaver. Restore Shaver Performance: Replacing the head helps restore your shaver’s performance for a closer, more comfortable shave. Regular replacement ensures long-term optimal performance. Color: As shown Material: ABS + Metal Package Contents: 1 x Shaving head Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by up to +/- 1-3 cm.