38220090000 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, 38220030000 under HS Code Others, and 39269049000 under HS Code OTHER ARTICLES OF PLASTICS AND ARTICLES OF OTHER MATERIALS OF HEADINGS 3901 TO 3914- OTHER : RINGS, BUCKLES, TACKS, WASHERS AND OTHER DECORATIVE FITTINGS MADE OF PLASTIC USED AS TRIMMINGS AND EMBELLISHMENTS FOR LEATHER PRODUCTS; PATTERNS FOR LEATHER FOOT WEAR, LEATHER GARMENTS AND LEATHER GOODS: OTHER were the top imported HS Codes by ADVIRA TRADING CORPORATION in 2023.