Our Shaver Replacement Head Compatible with 340s-4 replacement head 3010BT 300S 301S 310S 320S 330S 360S 380S 3000S 3010S 3020S 3030S 3050CC 3080S 350CC 370CC 390CC 3090CC 3040S Replacement Shaving Head with Hypo-Allergenic Silver Foil Head with Bump Prevent Technology.Replacement shaver heads foil components designed for the closest shave without pain or irritation,Suitable for people with skin allergy The replacement head provides your shaver back to 99% performance and a closer shave, making shaving faster, smoother, and more thorough. You can keep your razor-sharp and don't have to worry about the sluggish heads anymore. Regular heads replacement is more hygienic and brings you the ultimate experience. We recommend replacing your shaver heads every 12 months to keep it sharp and efficient If you have any other questions, please contact us at any time. Replacement Shaving Head with Hypo-Allergenic Silver Foil Head with Bump Prevent Technology.Replacement shaver heads foil components designed for the closest shave without pain or irritation,Suitable for people with skin allergy