48115999000 under HS Code Others, 39072090000 under HS Code POLYACETALS, OTHER POLYETHERS AND EPOXIDE RESINS, IN PRIMARY FORMS; POLYCARBONATES, ALKYD RESINS, POLYALLYLESTERS AND OTHER POLYESTERS, IN PRIMARY FORMS - OTHER POLYETHERS:OTHER, and 84213990000 under HS Code CENTRIFUGES, INCLUDING CENTRIFUGAL DRYERS; FILTERING OR PURIFYING MACHINERY AND APPARATUS, FOR LIQUIDS OR GASES FILTERING OR PURIFYING MACHINERY AND APPARATUS FOR GASES: OTHER: OTHER were the top imported HS Codes by HERRICK FILTER MANUFACTURING CORPORATION in 2021.