sup7 spring steel flat bar 1.Width from 44.5~140mm 2.Thickness from 6 ~ ... ,SUP11A 4.TS16949,COC,CIQ China sup7 spring steel flat bar Our flat steel factory found in 1999, certificated by ISO9001 ... and lead time by ourselves.1. Spring Raw material & flat bar after-cutting;2. Grade from SUP7(9260), SUP9(5155), SUP9A ... available according to customers' request China sup7 spring steel flat bar