Replacement SH90 Shaver Blade Heads, Compatible for Philips Norelco, 9000series，SW6700/91, SW9700/83, S9311/27, S9311/84, S9311/87, S9321/88(3pc-SH90)

Choose the appropriate blade: Ensure that the selected blade is compatible with the model of the shaver. Keep clean: Clean the shaver before replacing the blade. You can rinse with water or use a brush to remove any residue after shaving to ensure that the new blade can be installed properly and maintain hygiene. Safe operation: During the process of replacing the blade, pay attention to the sharpness of the blade and avoid direct contact with the blade by hand. It is recommended to use tools or wear gloves to protect oneself. Regular replacement: Based on the frequency of use and wear of the blade, it is recommended to replace it every few months or as the blade becomes dull. Ensure fixation: After replacement, ensure that the blade is firmly fixed without any looseness.