Shutter Spring Steel Strip

gwyl co.,ltd has over 10 years production experience in part of shutter spring steel strip which is hardened and tempered made from prime mediumhigh carbon steel strip material grade named : ck67 ck70 c67 c67s sae1070 sae1075 etc. Generally, ck67 and sae1070 are most popular, our customers from sn america, eastern europe, middle east in which almost has over 40 countries like this kinds of material. The product has been passed a inspection of recycling 30,000 times up and down without break. Clients prefer premeters below for reference : I size: coil wight: 150 kg coil id: 400 mm coil od: 650 mm per pallet weight: 2.3-2.5 tonnes