Bolt Diameter 3mm- 100mm, Length: 600mm - 6000mm; Bolt Inch diameter ranges: 6#- 11/2" Length: 1/2"- 18". The bolts grade: Grade 4.8, Grade 6.8, Grade 8.8 and Grade 10.9 Hex nuts grade: Grade5, Grade8 and Grade 10, Surface treating: Original color, blacken, plated zinc, hot dipped galvanized zinc and Dacromet zinc.