TUNALAR GROUP COMPANIES Tunalar Group has been producing since 1972 in automotive TRUCK DUMPER SECTOR and he began to produce STEEL SECURITY DOORS in 1998. Tunalar Group’s first principle is “quality”. So the group company TUNA STEEL DOOR Co. Ltd. Produces Steel Doors with the trade mark TUNA with the principle of “quality and customer satisfaction”. TUNALAR GROUP invested on INTERIOR ROOM DOORS sector and in 2007 they begun to production. Production is for different type of room doors like American panel or real natural covering or alphi covering. Capacity of room doors is 2.500 pcs per month. Also TUNALAR GROUP companies 2 more steel doors companies that make manufacturing with different trade marks and one foreign trade marketing company (NİLTUNA Ltd. Şti.) also.