391740000019 under HS Code TUBES, PIPES AND HOSES, AND FITTINGS THEREFOR (FOR EXAMPLE, JOINTS, ELBOWS, FLANGES), OF PLASTICS - FITTINGS, 848190000000 under HS Code Others, and 848180850000 under HS Code Others were the top imported HS Codes by OBA ALTYAPI INSAAT VE DIS TICARET LIMITED SIRKETI in 2021.