38220090 under HS Code DIAGNOSTIC OR LABORATORY REAGENTS ON A BACKING, PREPARED DIAGNOSTIC OR LABORATORY REAGENTS WHETHER OR NOT ON A BACKING, OTHER THAN THOSE OF HEADING 3002 OR 3006; CERTIFIED REFERENCE MATERIALS DIAGNOSTIC OR LABORATORY REAGENTS ON A BACKING, PREPARED DIAGNOSTIC OR LABORATORY REAGENTS WHETHER OR NOT ON A BACKING, OTHER THAN THOSE OF HEADING 3002 OR 3006; CERTIFIED REFERENCE MATERIALS: OTHER, 73069099 under HS Code Others, and 32089090 under HS Code PAINTS AND VARNISHES (INCLUDING ENAMELS AND LACQUERS) BASED ON SYNTHETIC POLYMERS OR CHEMICALLY MODIFIED NATURAL POLYMERS, DISPERSED OR DISSOLVED IN A NON - AQUEOUS MEDIUM; SOLUTIONS AS DEFINED IN NOTE 4 TO THIS CHAPTER - OTHER : OTHER were the top imported HS Codes by DAEJIN SUN VINA CO LTD in 2021.