1. High quality materials, continuous, efficient and easy to use.2. Suitable for: S1000 S3000 S4000 S5000 S500 XZ5800 XZ580 SW175 series 3. The shaving head should be replaced every 18 months.4. Changing the shaving head can increase the shaving result by 25%. For best performance, clean regularly.5. Replace the head to restore your shaver to 100% performance. High quality and durable. Easy to install. Sealed container. Name: Replacement Razor Blade for Color: Silver Material: Stainless Steel Package Contents: 6 x Shaver Blade 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 error is +/- 1-3cm. Shipping Time: We can ship all products within 5~8 business days