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OOU OOU is committed to researching, manufacturing and marketing in high quality kitchen products. We own tens of patent for inventions, especially the BO oxidation treatment. We take pride in this high technology used on knives, so that our products keep anti-corrosive and anti-rust for a long time. The household products we provide are unique and muti-functional, satisfying youths in pursuing and tasting profession. Innate Beauty Unique Proprietary BO Oxidation Technology, which not only efficiently improve the function of anti-rusting and anti-corrosion, but also dress up an elegant black coating for the knife. Approved by FDA certification. A perfect combination of health, technology and beauty. Focus on Quality Adopts the best high-carbon stainless steel with integrated ergonomic handle, full tang blade, anti-skid and comfort breathable, toughness of 56±2 Rockwell Hardness, with a cutting angle which less than 15 degree, OOU knife is durable and ultra sharp. Force to Easy Lightweight, full tang blade, integrated ergonomic handle, makes everything easy to use as your arm, also it is easy to clean by its special oxidation coating. What's in the package? 1pc x 7" Black Shark Series Professional German High Carbon Steel Chef's Knife Specification 【Whole Length】: 12.2 inches 【Blade Length】: 7.0 inches 【Blade Thickness】: 0.08 inches 【Weight】: 5.4 oz 【Package Oversize】: 14.3 X 3.5 X 1.5 inches 【Package Weight】: 14.1 oz 【Material】: X50CrMoV15 【Hardness】: HRC 56±2