Detailed Product Description 1) Standard: DIN, ANSI/ASME, BS, GB, JIS, Non-standard. 2) Material: Carbon steel, stainless steel 3) Grade: Grade 4.8, grade 8.8 4) Dimension: 4mm-48mm, 1/4"-20---1"-8. 5) Length: General (1000mm-3000mm), we also can produce according toyour requirement 6) Coating: Nature, Zinc plating, blackening, hot dip zinc, environment-friendly zinc plating