Diameter M6-1/2''Length 65mm-4½''Thread MM UNCMaterial Carbon Steel Alloy Steel Stainless SteelGrade 5.8 6.8 8.8 10.9 A2-50 A2-70 A4-50 A4-70Finish BLACK ELECTROPLATED H.D.G See more specifications about Anchor Rods at http://nnhwejgj.en.alibaba.com.