| SIZE:M:M3-M20;L:10-500 M:1/4-3/4,L:1-24 Finished: zinc plated(cr3+,cr6+),black treatment, hot galvanization,nickel plated, chrome plated or stainless steel etc. Also produce non-standard pieces according to your drawings or samples.Material:Carbon steel, 40cr, Good product performance.Various packings are available | 
