... 12mm Standard:ASTM,BS,DIN,GB,GIS Type:Spring Steel grade:45#,60#,65#,70#,72A,72B,80#,82B Steel ... gauge0.2-12mmStandardASTM,BS,DIN,GB,GISType SpringSteel grade 45#,60#,65#,70#,72A,72B,80#,82BModel numberYX1ApplicationManufacturingBrand ... quality and lowest price.Sincerely welcome to contact us for the future details if any item interest you , ... equality and mutual benefit.we are waiting for your email.