1. Compatible with 30B 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: Made of high-quality materials to achieve continuous, efficient and easy-to-use shaving. 3. Shaving effect: To maintain a flawless shave, we recommend changing the blade every 18 months. In 18 months, the electric shaver can cut more than 6 million hairs, which gradually reduces the cutting performance. 4. Treatment technology: The replacement head uses a treatment technology that better adapts to the skin structure. 5. Performance: Replacing the head can improve the performance of the shaver and provide a more effective shave. By replacing the head regularly, your shaver will stay in top condition for many years to come. Color: as shown Material: Plastic and 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.