Product Description 1. Fits 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, efficient and user-friendly characteristics. 3. Best shaving effect: To get the best shaving effect continuously, we recommend that you replace the shaving head every 18 months. Within 18 months, your electric shaver can trim more than 6 million hairs, which gradually reduces the trimming performance. 4. Special processing technology: The replacement head uses a special processing technology that highlights the texture of your shaver. 5. Restore performance: Replacing the head can restore the shaver's performance and provide a better shaving effect. By replacing the head regularly, the shaver will stay in the best condition for many years. Color: as shown Material: Plastic + Metal Package Contents: 2 x Shaver 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.