54023300 under HS Code SYNTHETIC FILAMENT YARN (OTHER THAN SEWING THREAD), NOT PUT UP FOR RETAIL SALE, INCLUDING SYNTHETIC MONOFILAMENT OF LESS THAN 67 DECITEX TEXTURED YARN :OF POLYESTERS, 54024400 under HS Code SYNTHETIC FILAMENT YARN (OTHER THAN SEWING THREAD), NOT PUT UP FOR RETAIL SALE, INCLUDING SYNTHETIC MONOFILAMENT OF LESS THAN 67 DECITEX OTHER YARN, SINGLE, UNTWISTED OR WITH A TWIST NOT EXCEEDING 50 TURNS PER METRE : OF ELASTOMERS, and 84472000 under HS Code Others were the top imported HS Codes by A & T FLAT KNIT INDUSTRY in 2021.