9031803800 under HS Code Others, 9033000000 under HS Code PARTS AND ACCESSORIES (NOT SPECIFIED OR INCLUDED ELSEWHERE IN THIS CHAPTER) FOR MACHINES, APPLIANCES, INSTRUMENTS OR APPARATUS OF CHAPTER 90, and 9002900009 under HS Code LENSES, PRISMS, MIRRORS AND OTHER OPTICAL ELEMENTS, OF ANY MATERIAL, MOUNTED, BEING PARTS OF OR FITTINGS FOR INSTRUMENTS OR APPARATUS, OTHER THAN SUCH ELEMENTS OF GLASS NOT OPTICALLY WORKED OTHER were the top imported HS Codes by LABOMET LLC in 2021.