Braun Series 8 replacement blades are recommended to be replaced every 18 months. - Model: Series 8 - Part Type: Replacement Blades - Made in: Germany - Recommended Replacement Period: 18 months ※Some people are selling the same packaged product at a lower price, but some may be handling products with poor quality, so we recommend that you carefully check the reviews before making a decision.※ Thank you for viewing.