1. Material: ABS 2. Environmentally friendly material, durable, healthy and safe 3. Simple replacement: easily install a new shaver head 4. Please clean the shaver before installation 5. To maintain a good shaving effect, we recommend replacing the shaver head every 18 months 6. Suitable for 3 series models: 300S, 301S, 310S, 320S, 330S, 340S, 360S, 380S, 3000S, 3010S, 3020S, 3030S, 3040S, 3050S, 3080S, 3090S, 350CC, 370CC, 390CC, 3050CC, 3090CC, 5772, 5773, 5774, 5776, 5779