This product is the best choice for springs and chains for car and agriculture machine. spring steel quick DetailsGrade: 65Mn, 60Si2Mn spring steel dimensions: 60*8mm-150*20mm spring steel standard: AISI, ASTM, BS, DIN, GB, JIS, custome... spring steel place of Origin: Tianjin China (Mainland) Brand Name: ZHUXIN Type: Spring Steel Bar spring steel application: Auto manufacture, spring wire spring ...