... blue,white,yellow,black,polished Hardened and tempered steel stripMaterial: ck50,ck60,ck67,ck70,ck75, 50CrV4, ... for standard sea worthApplication: bandsaw, handsaw, chainsaw, plaster trowel, putty knives, rolling door shutter spring, steel shank, steel toe cap, steel ... , toughness, hardness and elongationGood tolerance for thickness controlledColoured Tempred steel strip 50CrV4 alloy spring steel trip