Guney Shutter Springs offers the springs of its brand name to its customers by bringing the steels obtained from the best European steel producers together with state of the art technology machineries. <br/><br/>The raw material of the shutter springs which Guney Shutter Springs pioneers are in C75Cr quality, in accordance with DIN 17222, DIN 1544 and DIN 50049 2-3-p norms and have ISO 9002 certificate.