... 300mm width blue,white,yellow,black,polished Hardened and tempered steel stripMaterial: ck50,ck60,ck67,ck70,ck75, 50CrV4, 60Si2Mn ... trowel, putty knives, rolling door shutter spring, steel shank, steel toe cap, steel insole, spring metal part, lawn mower blade, ... quality control procedures. The strips produced undergoes a continuous on line inspection followed by random sample test and laboratory ...