Threaded Rod Information:Size: M6- M24Material: Carbon steel 3 Grade:4.8, 5.8, 6.8, 4Standards: DIN 975, ISO, DIN 975, ANSI, JIS, GB, BS, etcMaterial: Low carbon steel, mild carbon steelStandards Grade: 4.8, 5.8, 6.8, 8.8, 10.9 B7Diameter: M4-M52, 1/4" to 2"Length:1 meter to 3 meters (routine), according to the customers' requestsgalvanized Threaded tie rod Surface Treatmnt: Plain, white zinc plated, blue-white zinc plated, yellow zinc plated, hot dipped galvanization, black.