Description Product Description Get your shaver back to 100% performance with the Braun Series 5 51s replacement head. Braun recommends changing your shaver?s blades every 18 months to maximize shaving performance and comfort. With this shaver head you will get back to the superior close shave you have come to expect from Braun. Brand Story By Braun Features details World's # 1 Foil Shaver Brand Official Electric Shaver of the NFL Shaver head should be replaced every eighteen months. Replacing your razor head gives a 25% better shave. For optimum performance; clean regularly. The replacement head get's your shaver back to 100% performance and a closer shave. World's # 1 Foil Shaver Brand; Based on global Braun value share in electric foil shaver market from May 2013 to to April 2014. Official Electric Shaver of the NFL Fits Braun Series 5 (590 and 550) Shaver head should be replaced every eighteen months Replacing your shaver head gives a 25% better shave. For optimum performance; clean regularly Product information Product Dimensions ?0.98 x 3.99 x 4.37 inches; 0.32 Ounces Item Weight ?0.32 ounces Manufacturer ?Braun ASIN ?B001VEK1IU Item model number ?Series 5 Combi 51S. ShipN24Hours. Inventory Location 5768