391740000019 under HS Code TUBES, PIPES AND HOSES, AND FITTINGS THEREFOR (FOR EXAMPLE, JOINTS, ELBOWS, FLANGES), OF PLASTICS - FITTINGS, 690721000000 under HS Code Others, and 854449931119 under HS Code INSULATED (INCLUDING ENAMELLED OR ANODISED) WIRE, CABLE (INCLUDING CO-AXIAL CABLE) AND OTHER INSULATED ELECTRIC CONDUCTORS, WHETHER OR NOT FITTED WITH CONNECTORS; OPTICAL FIBRE CABLES, MADE UP OF INDIVIDUALLY SHEATHED FIBRES, WHETHER OR NOT ASSEMBLED WITH ELECTRIC CONDUCTORS OR FITTED WITH CONNECTORS - OTHER ELECTRIC CONDUCTORS, FOR A VOLTAGE NOT EXCEEDING 80 V -- OTHER --- OTHER ----RUBBER INSULATED OF A KIND USED IN TELECOMMUNICATION. were the top exported HS Codes by UDDM YAPI SANAYİ TAAHHÜT İÇ VE DIŞ TİCARET LİMİTED ŞİRKETİ in 2021.