1. Suitable for 3 Series 30B: 310, 330, 340, 199, 197s-1, 195s-1, 199s-1, 4735, 4736, 4737, 4745, 4775, 4835, 4845, 4875, 4876, 5713, 5714, 5491, 5492, 5493, 5494, 5743, 5745, 5742, 7475, 7493, 7497, 7504, 7505, 7510, 7511, 7514, 7515, 7516, 7520, 7526, 7540, 7546, 7564, 7570, 7630, 7640, 7650, 7664, 7680, 7690, 7763, 7765, 7783, 7785, 7790. 2. High-quality materials: It is made of selected high-quality materials to achieve continuous, effective, and easy-to-use properties. 3. The best shaving effect: To continuously get the best possible shaving effect, we recommend changing the shaver head every 18 months. Within 18 months, your electric shaver can trim more than 6 million hairs, which gradually reduces trimming performance. 4. Special processing technology: The replacement head uses a special processing technology that further highlights the texture of your shaver. 5. Restore performance: By changing the head, you can restore the shaver's performance and get a better shaving effect. By changing the head regularly, the shaver will maintain its best condition for many years. Color: as shown Material: Plastic + Metal Package Contents: 2 x shaving accessories Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm. Our products are made of the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and description, we have provided detailed information about the product, including its features and specifications. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please do not hesitate to contact us. We are here to help you and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it.