1. Suitable for 3 series: 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 high-quality materials to achieve continuous, efficient and easy-to-use characteristics. 3. The Best Shaving Effect: In order to get the best shaving effect continuously, we recommend that you change the shaving head every 18 months. Within 18 months, your electric shaver can trim more than 6 million hairs, thereby gradually reducing pruning performance. 4. Special Processing Technology: The replacement head adopts a special processing technology to which more the texture of your shaver. 5. Restore Performance: Changing the head can restore your shaver's performance and get a better shave effect. By changing the head regularly, the shaver maintain its best condition for many years. Type: replacement accessories color:As shown Material:Plastic + Metal Package Contents: 10 x Omentum 10 x clean brush Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.