As SMS STEEL DOOR, "UNLIMITED SERVICE IN QUALITY" UNLIMITED! We set off with the motto of IMS.SMS brings its original designs to your door with the aesthetic elegance of steel ... ÖZNUR Çelik Kapı Ltd., which operates in the fields of design, production, sale and service. Ltd. Şti. Was established in Ankara in 1996 to manufacture steel doors. Since the establishment of our company, by adopting the principle of high customer satisfaction; aims to offer quality, aesthetics, trust and speed together. In 2005, TSE "Manufacturing Sufficiency, Service Sufficiency and Compliance with Turkish Standards" was branded by registering SMS in 2005. We were entitled to receive our ISO 9001-2008 CERTIFICATE in 2006.