HQ & 1st Factory : Tel. 043-218-2183~5 Fax. 043-218-2187 E-mail. greenoptics@greenopt.kr
                     45, Gangni 1-gil, Ochang-eup, Cheongwon-gu Cheongju-si, Chungcheongbuk-do, Korea

2st Factory : Tel. 043-215-9555~6 Fax. 043-215-9557
              56, Gangni 1-gil, Ochang-eup, Cheongwon-gu Cheongju-si, Chungcheongbuk-do, Korea

3st Factory : Tel. 043-218-2185 Fax. 043-213-2186
              50, Gangni 1-gil, Ochang-eup, Cheongwon-gu Cheongju-si, Chungcheongbuk-do, Korea