Easy to install.Clean the razor before installing.Please make sure well your razor model.For Braun Series 5 8000 51S Replacement Foil Head & BladeCompatible with:For all 51S models including:Type: 5643, 5644, 5645, 5646, 5647, 5649, 5751, 5757, 5758Model NO: 8970, 8975, 8985, 8986, 8987, 8990, 8991, 8995,8595, 8795, 8581, 8583, 8585, 8588, 8590, 8781, 8783, 8790, WF1s, 510, 550, 560, 570cc, 590cc,530s-4, 550, 550s-3, 550s-4, 550cc-4, 560, 560s-3, 560s-4, 565cc-4,570cc, 570cc-3, 570cc-4,590cc, 590cc-3, 590cc-4, 8385 C&R,8374, 8377 - Series 5, ContourProColour:SilverMaterial:Nylon + stainless steelSize:Net cover 4.4*2.5*2cm, cutter head 3.1*1.7cmPackage Contents:1 x Replacement Foil Head1 x Shaver Cutter BladeNote: The method of checking the replacement part number of the shaver is as follows: Push open the shaver"s sideburns trimmer and you will see the replacement part number (for example, 10B, 30B, 32, 51S, etc.)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 +/- 1-3cm.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it