... , API and RRW-410D Item Information Steel materials quality carbon spring steel ,60# ,65#,70#,72A,82B StandardISO ,DIN, ASTM, ... JIS , etc Tensile strength1770mpa,1570mpa,1670mpa,1860mpa,1960mpa Highcarbon spring steel wire (Galvanized,Ungalvanized,coatedPVC/PE /Teflon/Rubber/SLPE)steel ... . 0.15 mm -12 mm ( carbon spring steel wire ) 2.1.2 mm - 20 mm ( steel wire rope ) MOQ5000 meters OEM or not ...