Detailed Product Description 1) Standard: DIN555,DIN934,DIN971-1,DIN4033,DIN971-2,DIN439-2,DIN439-1,DIN4312) Material: Carbon steel3) Grade: Grade 4.8, grade 8.8 4) Dimension:according toyour requirement 5) Length: according toyour requirement 6) Coating: Nature, Zinc plating, blackening, hot dip zinc, environment-friendly zinc plating