1.PRODUCTS: spring steel strip0, shutter spring, band steel, spring steel, band spring, cold rolled non alloy steel strip, tempered & hardened steel strip, shutter spring, spring steel strip, spring for rolling door/garage door, rolling door spring & spring box, handle, hook 2.MATERIAL: 65Mn C50 T8A T10A 60Si2Mn 3.specification Cold rolled steel strip, Tempered and Hardened Steel Strip /Spring Steel Strip/ Band Saw Steel Strip thick: 0.30mm-2.50mm wide: 30mm-300mm4. Finish: black, yellow, bright, black, HRC44-50 Bright Anealed: HRC20-305. APPLICATION: mud trowel, shovel,bandsaw, automatic clutch patch,rolling door spring (round edge), horologe clockwork spring,lock making,shoes material, hook material, spin, standard stamping etc6. lead time: 30days7. Packing: sea-worthy ZOEDIAMOB: +86 159 539 99396MAIL: sale-6 at liangyusteelstrip dot comQQ: 279895433