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 high-quality materials to achieve continuous, efficient and user-friendly characteristics. 3, The shaving effect: To maintain the shaving effect continuously, we recommend that you replace the razor blade every 18 months. Within 18 months, your 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 matches the structure of your skin. 5, Performance: Replacing the head can improve the performance of your shaver and provide a better shaving effect. By replacing the head regularly, your shaver will stay in top condition for many years. Color: as shown Material: Plastic+Metal Package Contents: 2 x Shaving Attachments Only the above package contents, other products are not included. Note: Light and different monitors may cause the color of the item to look slightly different from the picture. The measurement allowed error is +/- 1-3 cm.